\r\n\u003C/p>\r\n\u003Cp>This new reality should not obscure the fact that, for more than a century, Audemars Piguet was an integral part of the \u003Ci>établissage\u003C/i> system. Within this production mode, the \u003Ci>établisseur\u003C/i> assembled and finished watch mechanisms whose components were produced in a large number of highly specialised workshops, from small home-based dial-makers to large movement-blank factories. Nurtured by friendships and combining talents as well as ideas, this dense and dynamic network enabled the Swiss watch industry to flourish from the 19\u003Csup>th\u003C/sup> century onwards. It was this ecosystem that gave rise to Calibre 2120.\u003Cbr />\r\n\u003C/p>",[81,86],{"fileReference":82,"mobileFileReference":59,"caption":83,"altText":84,"assetPagePath":85,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--f23cc71a-55fe-4739-a315-1df38738abb5/ap-chronicles-image.webp?preferwebp=true","1882. Audemars Piguet advertisement. Published in February 1882 in the only Swiss watchmaking periodical of its time, this ad is the oldest known by the brand. Journal suisse d'horlogerie, February 1882. © Musée International d'Horlogerie de La Chaux-de-Fonds Collection.","1882. Audemars Piguet advertisement. ","/content/ap/chronicles/ww/en/assets/205_1_1_v3",{"fileReference":87,"mobileFileReference":59,"caption":88,"altText":89,"assetPagePath":90,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--0a4b095b-febb-4011-b305-73c7fc1c6e7e/ap-chronicles-image.webp?preferwebp=true","1904. Audemars Piguet advertisement. Published betwen 1904 and 1918 in different versions, this ad was addressed to retailers. It presented the brand's main specialties: horological complications and extra-thin watches. Journal suisse d'horlogerie, November 1904. © Musée International d'Horlogerie de La Chaux-de-Fonds Collection.","1904. Audemars Piguet advertisement. ","/content/ap/chronicles/ww/en/assets/205_1_2_v3","white","apchronicles/components/textcarousel",[94,95],"title","textcarousel","apchronicles/components/chapter",{"columnCount":5,"gridClassNames":6,"columnClassNames":98,":items":99,":itemsOrder":117,":type":96},{"textcarousel":8,"title":8},{"title":100,"textcarousel":103},{"id":101,"linkDisabled":33,"type":75,"text":102,":type":77},"title-903c8b66b3","Friendship Stories: Audemars Piguet, LeCoultre & Cie and Vacheron Constantin",{"text":104,"images":105,"imageControlIconColor":91,":type":92},"\u003Cp>Ever since the 19\u003Csup>th\u003C/sup> century, Audemars Piguet had been an \u003Ci>établisseur\u003C/i>. In the small Le Brassus workshops, a handful of watchmakers adjusted, finished, assembled and fitted components made by independent Vallée de Joux artisans such as Louis Elisée Piguet, Louis Audemars, Victorin Piguet, Alfred Aubert and many others.\u003C/p>\r\n\u003Cp>Relationships between these craftsmen often went well beyond the strict setting of the workbench and extended to the choir and the gymnastics or ski jumping club. In a remote valley, everyone knew each other, friendships consolidated solid work collaborations and family relationships deepened them. By way of example, Georges Golay – who joined Audemars Piguet in 1945 and would later run the company from 1967 to 1987 – was a great friend and card-playing companion of former managing director Roger LeCoultre (1906 – 1971).\u003C/p>\r\n\u003Cp>This friendship is just one expression of the strong ties that Audemars Piguet and LeCoultre & Cie (renamed Jaeger-LeCoultre in 1979) nurtured from the 19\u003Csup>th\u003C/sup> century onwards. Mentions of these relations appear in the archives since at least 1882, but it was in the aftermath of World War II, and more specifically from 1948 onwards, that these companies drew closer together.\u003C/p>\r\n\u003Cp>A third player played an important role in the birth and development of Calibre 2120. In the 1960s, Geneva-based company Vacheron Constantin already had an over two-century history behind it. It belonged to the same financial entity as LeCoultre & Cie: the SAPIC group (\u003Ci>Société Anonyme des Participations Industrielles et Commerciales\u003C/i>).\u003Cbr />\r\n\u003C/p>\r\n\u003Cp>In addition to this close relationship with the movement blank manufacturer, Vacheron Constantin had been a loyal customer of Audemars Piguet since the 1880s. In the 1950s, the ties were so strong that some Audemars Piguet watches were sold in the Vacheron Constantin boutique in Geneva! It was in fact Vacheron Constantin’s Sales Manager, Francis Berger, who sold the first white gold Royal Oak to the Shah of Iran in 1972, a unique piece crafted upon his request.\u003Cbr />\r\n\u003C/p>",[106,112],{"fileReference":107,"mobileFileReference":59,"caption":108,"altText":109,"assetPagePath":110,"disableSharing":111,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--899aa5ce-3fcd-47f9-9b2f-7eb6cda20a0b/ap-chronicles-image.webp?preferwebp=true","1920s. Ski Jump, Le Brassus. Paul Edward Piguet (1890–1979), son of one of Audemars Piguet's co-founders, jumping. In the background we can see Audemars Piguet's oldest building, the future museum of the company. Photograph taken from the Jacques Piguet Collection. ","1920s. Ski Jump, Le Brassus. ","/content/ap/chronicles/ww/en/assets/205_2_1",true,{"fileReference":113,"mobileFileReference":59,"caption":114,"altText":115,"assetPagePath":116,"disableSharing":111,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--3b910c2c-aa24-49c7-8752-df984d7d65ed/ap-chronicles-image.webp?preferwebp=true","1959. Promoters of the international ski competition in Le Brassus. On the left: Georges Golay, future Managing Director of Audemars Piguet and initiator of the Nordic ski competitions in Le Brassus; on the right: Roger Lecoultre, Director of the LeCoultre & Cie Manufacture and ski competition \"\"hospitality manager;\"\" in the middle: Bianchi, ski club president. Image taken from the book Épreuves internationales de ski Le Brassus, Vallée de Joux, published by Jacques Piguet in 2017, p. 101.","1959. Promoters of the international ski competition in Le Brassus. ","/content/ap/chronicles/ww/en/assets/205_2_2",[94,95],{"columnCount":5,"gridClassNames":6,"columnClassNames":119,":items":120,":itemsOrder":150,":type":96},{"text":8,"title":8,"carousel":8},{"title":121,"text":124,"carousel":127},{"id":122,"linkDisabled":33,"type":75,"text":123,":type":77},"title-3f4437a253","The Ultra-Thin Trend",{"text":125,":type":126},"\u003Cp>Let us now take a look at Calibre 2120, which measures a mere 2.45 mm in thickness. Drastically reducing the thickness of a mechanism represented a major technical feat. At Audemars Piguet, this speciality appeared between 1900 and 1910, at a time when competition was particularly intense in the field of miniaturisation. In 1921, for example, Audemars Piguet’s 1.32 mm-thick Calibre 17SVF#5 (Ch. Piguet movement blank), beat the record set by its neighbour LeCoultre & Cie in 1907. It measured 0.06 mm less (the equivalent of a hair’s breadth!)\u003C/p>\r\n\u003Cp>In the wake of World War II, Audemars Piguet specialised in ultra-thin watches. This previously secondary field of interest became a core activity. In 1958, over 75% of Audemars Piguet watches contained Calibre 2003, a barely 1.64 mm-thick mechanism whose design was developed by LeCoultre & Cie.\u003Cbr />\r\n\u003C/p>","apchronicles/components/text",{"images":128,"imageControlIconColor":91,":type":149},[129,134,139,144],{"fileReference":130,"mobileFileReference":59,"caption":131,"altText":132,"assetPagePath":133,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--46b9c91c-92a6-45ba-a274-643a86390497/ap-chronicles-image.webp?preferwebp=true","1950. Audemars Piguet advertisement. In the aftermath of World War II, Audemars Piguet specialised in the ultra-thin. Journal suisse d'horlogerie, May 1950. Musée International d'Horlogerie de La Chaux-de-Fonds Collection.","1950. Audemars Piguet advertisement. ","/content/ap/chronicles/ww/en/assets/205_3_1",{"fileReference":135,"mobileFileReference":59,"caption":136,"altText":137,"assetPagePath":138,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--9e9dd4f0-7f0e-4c5b-838c-b147261a70b6/ap-chronicles-image.webp?preferwebp=true","1952. Pocket watch equipped with the world's thinnest calibre. Created in 1921, Calibre 17SVF#5 features a total thickness of 1.32 mm. Movement 47831. “Knife-type” case no. 489 in platinum. Sold in 1952 to Gübelin (Lucerne). Audemars Piguet Heritage, inv. 250.","1952. Pocket watch equipped with the world's thinnest calibre.","/content/ap/chronicles/ww/en/assets/205_3_2",{"fileReference":140,"mobileFileReference":59,"caption":141,"altText":142,"assetPagePath":143,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--374dee62-f91f-4a87-8e09-f7c0d5610084/ap-chronicles-image.webp?preferwebp=true","Circa 1950. Audemars Piguet promotional brochure, cover. The coats of arms of the Audemars and Piguet families overlook two pocket watches, so thin that they seem to be floating in the air. Audemars Piguet Archives. ","Circa 1950. Audemars Piguet promotional brochure, cover. ","/content/ap/chronicles/ww/en/assets/205_3_3",{"fileReference":145,"mobileFileReference":59,"caption":146,"altText":147,"assetPagePath":148,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--22cb5bc2-013b-4263-b6e2-ecef57e5e5a9/ap-chronicles-image.webp?preferwebp=true","1960. Audemars Piguet advertisement (cover). Used as early as 1950, the image highlights the watch's extreme thinness. Destined to the American market, the promotional brochure mentions a point of sale on the 5th Avenue, New York. Audemars Piguet Archives. ","1960. Audemars Piguet advertisement (cover). ","/content/ap/chronicles/ww/en/assets/205_3_4","apchronicles/components/carousel",[94,151,152],"text","carousel",{"columnCount":5,"gridClassNames":6,"columnClassNames":154,":items":155,":itemsOrder":178,":type":96},{"threeimages":8,"text":8,"title":8},{"title":156,"text":159,"threeimages":161},{"id":157,"linkDisabled":33,"type":75,"text":158,":type":77},"title-846047e190","Selfwinding and Thin: the Impossible Equation",{"text":160,":type":126},"\u003Cp>Another prominent feature of post-war watchmaking was the spread of selfwinding movements. This system involves an oscillating weight (or rotor) that rotates each time the wearer moves their wrist, in such a way as to use this energy to drive the mechanism. The post-war boom period was dominated by new values and lifestyles: speed, efficiency, modernity, travel, multiple activities and youth. The spirit of the times was perfectly in tune with the rise of the selfwinding watch. What active man still had time to hand-wind his watch? Watchmakers were firm believers in this innovation, even though it would take time to convince some of the more conservative markets, particularly because the first selfwinding movements were very thick.\u003C/p>\n\u003Cp>In 1954, Audemars Piguet introduced its first selfwinding watches, notably Model 5112. Calibres 2498 and 2499 (LeCoultre movement blank 498-499, 6.65 mm thick) were wound by a gold oscillating weight featuring a Clous de Paris guilloché pattern. They were soon complemented and subsequently replaced by Calibres 2070, 2071 and 2072.\u003C/p>\n\u003Cp>Until that point, however, none of the selfwinding movements were thin, nor vice versa. Everyone was aware that a brand offering these two qualities in the same watch would have a significant edge, as confirmed by a letter dated 1958. LeCoultre had just suggested adding a date to Calibre 2498. Audemars Piguet refused because it would increase the thickness of the movement, arguing that “the clientele comes to us mainly for slim watches.” The message specified: “As competition is becoming ever stronger, we must be careful regarding the thickness of our products.” In fact, as early as 1960, Piaget introduced Calibre 12P which was just 2.3 mm thick, notably thanks to a micro-rotor serving to fit the oscillating weight into the thickness of the mechanism. Audemars Piguet chose a central rotor, a more powerful device yet a far more difficult option.\u003C/p>",{"images":162,":type":177},[163,168,173],{"fileReference":164,"mobileFileReference":59,"caption":165,"altText":166,"assetPagePath":167,"disableSharing":33,"imageControlIconColor":91,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--507932b9-b6cb-436a-8b1e-b85bd1013e9c/ap-chronicles-image.webp?preferwebp=true","1953. Selfwinding Calibre 2498. Diameter of 29.5 mm (13 lignes), 6.65 mm in height. Hours, minutes, small seconds, 21 jewels. Central rotor on steel ball bearings, bidirectional winding. Movement 62161. Audemars Piguet Heritage, inv. 2036.","1953. Selfwinding Calibre 2498.","/content/ap/chronicles/ww/en/assets/205_4_1",{"fileReference":169,"mobileFileReference":59,"caption":170,"altText":171,"assetPagePath":172,"disableSharing":33,"imageControlIconColor":91,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--c595255e-0f2c-4d8f-b79c-4021d6874c0c/ap-chronicles-image.webp?preferwebp=true","1956. Cross-section of seflwinding Calibre 498/99 (2498). Annotated copy of a plan produced in 1951 in the workshops of LeCoultre & Cie. Audemars Piguet Archives.","1956. Cross-section of seflwinding Calibre 498/99 (2498). ","/content/ap/chronicles/ww/en/assets/205_4_2",{"fileReference":174,"mobileFileReference":59,"caption":165,"altText":175,"assetPagePath":176,"disableSharing":33,"imageControlIconColor":91,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--1f6274e6-8793-4c39-8742-aed8093b1d72/ap-chronicles-image.webp?preferwebp=true","1953. Selfwinding Calibre 2498. ","/content/ap/chronicles/ww/en/assets/205_4_3","apchronicles/components/threeimages",[94,151,179],"threeimages",{"columnCount":5,"gridClassNames":6,"columnClassNames":181,":items":182,":itemsOrder":194,":type":96},{"title":8,"textimage":8},{"title":183,"textimage":186},{"id":184,"linkDisabled":33,"type":75,"text":185,":type":77},"title-4ba0d87190","False Starts",{"text":187,"image":188,"imageControlIconColor":91,":type":193},"\u003Cp>At the time, Jacques-Louis Audemars, grandson of one of the brand's founders, was in charge of developing new watch mechanisms. Technical Director and future Chair of the Board of Directors, he was above all a watchmaker.\u003C/p>\r\n\u003Cp>The Audemars Piguet company records contain a mention of a project for an ultra-thin selfwinding movement undertaken with Frédéric Piguet in 1960 but which never came to fruition. They do not specify whether LeCoultre, Vacheron Constantin or Audemars Piguet first launched the idea of Calibre 2120, but they suggest that it was the Manufacture in Le Brassus that took the lead. On June 9, 1964, Jacques-Louis Audemars complained to LeCoultre: “For the past three or four years we have been keeping our customers waiting and they are finding it increasingly hard to understand why the specialists in ultra-thin, high-luxury watches are still offering selfwinding watches that are among the thickest on the market!”\u003C/p>\r\n\u003Cp>In another letter, Jean Lebet, Technical Director of LeCoultre, recalled the history of the project. He explained that in 1962, a watchmaker by the name of Mainjot had presented a “patented selfwinding device which, according to him, should make it possible to produce a 2.3 mm-thick movement on the basis of the 803 movement blank (Calibre 2003).” The project was aborted because this mechanism required lengthy adjustments by the most highly skilled watchmakers and only the aforementioned Mainjot was capable of handling this task. LeCoultre then entrusted the project to Fernand Reymond, an experienced movement design engineer, but who died prematurely.\u003C/p>",{"fileReference":189,"mobileFileReference":59,"caption":190,"altText":191,"assetPagePath":192,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--1611bf7e-7d01-4084-b221-6e83afb9e094/ap-chronicles-image.webp?preferwebp=true","1964. Letter from Audemars Piguet to LeCoultre & Cie. Audemars Piguet explains to its main movement manufacturer the urgent need for an extremely thin selfwinding calibre to meet pressing customer demand. Audemars Piguet Archives.","1964. Letter from Audemars Piguet to LeCoultre & Cie. ","/content/ap/chronicles/ww/en/assets/205_5","apchronicles/components/textimage",[94,195],"textimage",{"columnCount":5,"gridClassNames":6,"columnClassNames":197,":items":198,":itemsOrder":215,":type":96},{"textcarousel":8,"title":8},{"title":199,"textcarousel":202},{"id":200,"linkDisabled":33,"type":75,"text":201,":type":77},"title-abcb44ce41","Jacques-Louis Audemars and Maurice Audemars",{"text":203,"images":204,"imageControlIconColor":91,":type":92},"\u003Cp>The Audemars Piguet archives contain correspondence with LeCoultre & Cie concerning the development of Calibre 2120. Letters, internal notes, sketches and prototype test reports attest to intense collaboration. Jacques-Louis Audemars regularly visited the village of Le Sentier, four kilometres from Le Brassus. There, he met with movement design engineer Maurice Audemars to discuss issues such as winding, springs, power reserve, thickness, balance wheel, barrel, etc.\u003C/p>\r\n\u003Cp>Maurice Audemars (ca. 1923–1974), a watchmaker-engineer who trained at the Vallée de Joux Technical School, was one of the industry’s hidden figures. Although the sources say little about him, he nevertheless played a fundamental role in the history of watchmaking. He invented several selfwinding systems (notably including patents CH256020A in 1948 and CH343294 in 1959). It is his name that appears on the selfwinding patent for Calibre 2120 filed on October 18, 1965 under number CH14388/65. Some sources, including the founder of AP Customer Service, Wilfred Berney, credit him with the paternity of the legendary Calibre 2003 (LeCoultre 803 movement blank) which he apparently created in 1953 at the age of 30. This 1.64 mm-thick mechanism was to make its mark on the entire second half of the 20\u003Csup>th \u003C/sup>century.\u003C/p>\r\n\u003Cp>It was therefore natural that Calibre 2003 should serve as the basis for the development of Calibre 2120, with which it shares several components. Plans from 1961 showing the reference 920 (the LeCoultre name for Calibre 2120) suggest that the project was already underway and really kicked off in the spring of 1963. The movement’s characteristics were steadily adjusted in terms of thickness, frequency and power reserve. From June 1964 to April 1965, Jacques-Louis Audemars wore a prototype on his wrist. Most of the plans were drawn up in 1966 and the first models were delivered in 1967 – the same year the very first quartz movements for wristwatches were introduced in the industry.\u003C/p>",[205,210],{"fileReference":206,"mobileFileReference":59,"caption":207,"altText":208,"assetPagePath":209,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--4800692d-6b10-431d-aa04-4d988cde3d5b/ap-chronicles-image.webp?preferwebp=true","1953–2000s. Extra-thin Calibre 2003. Thinnest hand-wound movement of its time (1.64 mm). In more than half a century, Calibre 2003 saw numerous technical evolutions. 20.8 mm in diameter (9 lignes). 18 jewels. 18,000 vph. Movement 68139 made in 1957. Audemars Piguet Archives. ","1953–2000s. Extra-thin Calibre 2003. ","/content/ap/chronicles/ww/en/assets/205_6_1",{"fileReference":211,"mobileFileReference":59,"caption":212,"altText":213,"assetPagePath":214,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--679bf510-ddf2-432b-b4d2-6c52807e3716/ap-chronicles-image.webp?preferwebp=true","1950s. Jacques-Louis Audemars. Grandson of one of the co-founders of Audemars Piguet, Jacques-Louis Audemars (1910–2002) joined the company in 1933 as a watchmaker before becoming Technical Director from 1959 to 1976. He then took the reins of the Administration Council from 1966 to 1992. It is his daughter who succeeded him in 1992. Audemars Piguet Archives. ","1950s. Jacques-Louis Audemars. ","/content/ap/chronicles/ww/en/assets/205_6_2",[94,95],{"columnCount":5,"gridClassNames":6,"columnClassNames":217,":items":218,":itemsOrder":256,":type":96},{"text":8,"title":8,"carousel":8},{"title":219,"text":222,"carousel":224},{"id":220,"linkDisabled":33,"type":75,"text":221,":type":77},"title-9b410f9582","A Masterpiece of Slimness and Robustness",{"text":223,":type":126},"\u003Cp>Calibre 2120 was endowed with outstanding characteristics. In 1967, its overall thickness of just 2.45 mm earned it the title of the world's thinnest selfwinding calibre with a central rotor, a status it would retain for decades.\u003C/p>\r\n\u003Cp>The text of patent CH14338/65 explains its main innovative feature. Its winding system delivered performance superior to that of the micro-rotor because the diameter of the rotor was wide (28 mm) and its weight was heavy: "the winding weight or rotor of a selfwinding watch must be as heavy as possible and notably feature the largest possible gyration radius. But in an ultra-thin mechanism, these qualities (diameter and thickness) might have weakened the system, especially in the event of impacts. Calibre 2120 nonetheless provided a simple solution: the rotor was supported on the periphery by ruby rollers, turning somewhat like train wheels on a railway track, “in order to reduce the strong tensions on the central axis bearing the rotor and keep the efforts involved in central pivoting to a minimum.” The circular rail is one of the most recognisable visual elements of this calibre.\u003C/p>\r\n\u003Cp>To ensure enhanced thinness, the movement does not feature a seconds hand. Its frequency corresponds to 19,800 vibrations per hour. It is equipped with an anti-shock system produced by the Kif Parechocs company, also based in the Vallée de Joux. The winding is bidirectional, which means that the mechanism is wound regardless of the rotor’s rotation direction.\u003C/p>\r\n\u003Cp>The decoration respects the highest standards, as indicated in finishing table 41131: circular graining, satin-brushing, polished sinks, chamfering, polishing, “Côtes de Genève”, gilding, snailing, felt polishing, etc. It is worth noting that the 21-carat gold oscillating weight is finely engraved with the inscription "Audemars-Piguet" (the hyphen between the two names is a curiosity of this calibre).\u003C/p>",{"images":225,"imageControlIconColor":91,":type":149},[226,231,236,241,246,251],{"fileReference":227,"mobileFileReference":59,"caption":228,"altText":229,"assetPagePath":230,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--ea7f73dc-8ead-4851-aec0-4f3ec0d42663/ap-chronicles-image.webp?preferwebp=true","1967–2011. Calibres 2120 and 2121, caseback side. Extra-thin selfwinding calibres. Diameter of 28 mm (12½ lignes). The aesthetic on the caseback side is similar for Calibre 2120 (between 1967 and 2006) and Calibre 2121 (between 1970 and circa 2011). Movement 127053 produced in 1970. Audemars Piguet Heritage, inv. 365.","1967–2011. Calibres 2120 and 2121, caseback side. ","/content/ap/chronicles/ww/en/assets/205_7_1_v3",{"fileReference":232,"mobileFileReference":59,"caption":233,"altText":234,"assetPagePath":235,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--c5e82ce4-a95d-40c4-9e46-4265d1140fb9/ap-chronicles-image.webp?preferwebp=true","1971. Calibre 2121, dial side. Thinnest selfwinding calibre with central rotor and date indication of its time (3.05 mm). Rotor supported by ruby rollers oscillating on a circular rail. Diameter of 28 mm (12½ lignes). 247 parts, 19,800 vph. Derived from Calibre 2120 (1967). Movement 127053. Audemars Piguet Heritage.","1971. Calibre 2121, dial side. ","/content/ap/chronicles/ww/en/assets/205_7_2_v3",{"fileReference":237,"mobileFileReference":59,"caption":238,"altText":239,"assetPagePath":240,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--fb17ed2c-d9e2-4764-a1c6-23e1e3851c66/ap-chronicles-image.webp?preferwebp=true","1970. Decoration table for Calibres 2120 and 2121 (VC 1120/1121). Copy of the LeCoultre Cie Plan 24131a for Audemars Piguet. Audemars Piguet Archives. ","1970. Decoration table for Calibres 2120 and 2121 (VC 1120/1121). ","/content/ap/chronicles/ww/en/assets/205_7_3",{"fileReference":242,"mobileFileReference":59,"caption":243,"altText":244,"assetPagePath":245,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--ec8fc7ad-071a-49be-ad83-111c775a0691/ap-chronicles-image.webp?preferwebp=true","1971. General characteristics of Calibre 2120 (LC 920). Copy of LeCoultre Cie Plan 24114b for Audemars Piguet. Audemars Piguet Archives. ","1971. General characteristics of Calibre 2120 (LC 920). ","/content/ap/chronicles/ww/en/assets/205_7_4",{"fileReference":247,"mobileFileReference":59,"caption":248,"altText":249,"assetPagePath":250,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--7e352ab5-77c7-482e-90aa-5f74edc131d5/ap-chronicles-image.webp?preferwebp=true","Circa 1970. Engraving project for oscillating weight, Calibres 2120 and 2121. Audemars Piguet Archives.","Circa 1970. Engraving project for oscillating weight, Calibres 2120 and 2121. ","/content/ap/chronicles/ww/en/assets/205_7_5_v3",{"fileReference":252,"mobileFileReference":59,"caption":253,"altText":254,"assetPagePath":255,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--f28140b2-b8fc-4a1c-ae11-f862c61b72ec/ap-chronicles-image.webp?preferwebp=true","1965. Patented system for oscillating weight on rollers. To evenly spread forces, the oscillating weight of the Calibres 2120 and 2121 features minuscule ruby rollers mounted on circular rails. Extract from Patent CH1438865A4. Audemars Piguet Archives.","1965. Patented system for oscillating weight on rollers. ","/content/ap/chronicles/ww/en/assets/205_7_6",[94,151,152],{"columnCount":5,"gridClassNames":6,"columnClassNames":258,":items":259,":itemsOrder":281,":type":96},{"textcarousel":8,"title":8},{"title":260,"textcarousel":263},{"id":261,"linkDisabled":33,"type":75,"text":262,":type":77},"title-4405526ce8","Launched in 1967",{"text":264,"images":265,"imageControlIconColor":91,":type":92},"\u003Cp>On March 22, 1967, four years after the real start of the project, Audemars Piguet delivered the first ten watches equipped with Calibre 2120, which was first fitted into Model 5271, designed by Gérald Genta. Subsequently, the round Models 5272, 5273, 5274 and more creative variants (5279, 5285, 5287, 5302, 5307, 5384) were produced.\u003C/p>\r\n\u003Cp>In 1967, more than 650 Audemars Piguet watches were already equipped with Calibre 2120! In ten years, more than 12,000 were sold. Within a few years, the movement replaced the 2070-71-72 versions, becoming one of the spearheads of the Manufacture. It also served in 1970 as the basis for the creation of the \u003Ca href=\"/en/calibre/2121\">2121\u003C/a> version with a date indication. Slightly thicker (3.05 mm), the latter notably equipped the first Royal Oak in 1972 and served as the basis for the 2800 perpetual calendar under-dial work introduced in 1978, which revitalised the history of complicated watches.\u003C/p>",[266,271,276],{"fileReference":267,"mobileFileReference":59,"caption":268,"altText":269,"assetPagePath":270,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--c18ce708-d563-4e86-b5b3-d80fbda545e5/ap-chronicles-image.webp?preferwebp=true","1967. Model 5271 equipped with Calibre 2120, the thinnest selfwinding movement with central rotor. Audemars Piguet Archives.","1967. Model 5271.","/content/ap/chronicles/ww/en/assets/205_8_1",{"fileReference":272,"mobileFileReference":59,"caption":273,"altText":274,"assetPagePath":275,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--d14015fd-80b1-4b88-87b7-d501800b1fd5/ap-chronicles-image.webp?preferwebp=true","Circa 1967–1968. Models equipped with Calibre 2120. After six years of development, Calibre 2120 equipped numerous models from its launch in 1967 onwards. From left to right and top to bottom: Models 5274, 5279, 5284, 5287, 5307, 5384. Audemars Piguet Archives. ","Circa 1967–1968. Models equipped with Calibre 2120. ","/content/ap/chronicles/ww/en/assets/205_8_2_v2",{"fileReference":277,"mobileFileReference":59,"caption":278,"altText":279,"assetPagePath":280,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--d577687d-f9b8-4f09-9da8-01938ccd0a39/ap-chronicles-image.webp?preferwebp=true","1964. Sketches for extra-thin watches. Sketches of watches realised in parallel to the development of the future Calibre 2120 (described here under the reference LeCoultre 920), destined to welcome it. Audemars Piguet Archives.","1964. Sketches for extra-thin watches. ","/content/ap/chronicles/ww/en/assets/205_8_3",[94,95],{"columnCount":5,"gridClassNames":6,"columnClassNames":283,":items":284,":itemsOrder":302,":type":96},{"twoimages":8,"text":8,"title":8},{"title":285,"text":288,"twoimages":290},{"id":286,"linkDisabled":33,"type":75,"text":287,":type":77},"title-497b0e15be","A Collective Project",{"text":289,":type":126},"\u003Cp>The watch industry microcosm thrives on rumours. A long-running one holds that LeCoultre Calibre 920 (921 with date) had been developed by Jaeger-LeCoultre for three companies: Audemars Piguet (Refs. 2120 and 2121); Vacheron Constantin (Refs. 1120 and 1121) and Patek Philippe (Refs. 28.255 and 28.255c – numbers referring to the 28 mm diameter and a 2.55 mm thickness without the date, meaning 0.1 mm more than the 2120 version). Yet to this day, there are no documents revealing the terms of a possible contract between the four companies. If the Audemars Piguet archives have not kept a copy, that might be because it was an exclusively verbal agreement.\u003C/p>\n\u003Cp>On the other hand, it is well known that Audemars Piguet used this mechanism to power its \u003Ca href=\"/en/article/birth-of-an-icon\">first Royal Oak in 1972\u003C/a>, Patek Philippe its first Nautilus as early as 1976 and that Vacheron Constantin equipped its 222 Overseas model with it as early as 1977. Specialists also agree that Jaeger-LeCoultre never fitted this movement – nor Calibre 2003 – in its own watches.\u003C/p>\n\u003Cp>Studying the Audemars Piguet archives has revealed that Vacheron Constantin was involved in the development of the mechanism between 1963 and 1966. Patek Philippe, on the other hand, seems to be entirely absent from these discussions. While this might lead one to believe that the Geneva firm played no role in the development, careful examination of the sources adds nuance to any such assertion. The Patek Philippe reference number "25.855" appeared on LeCoultre’s plans as early as February 28, 1965 and was regularly mentioned thereafter. However tenuous, these mentions nevertheless support the hypothesis that the development of the movement was funded by the watchmaking trio of the time, which retained exclusive use of it. It is now an indisputable fact that Audemars Piguet, in the person of Jacques-Louis Audemars, played the most active role in the technical collaboration with LeCoultre & Cie.\u003C/p>",{"images":291,":type":301},[292,296],{"fileReference":293,"mobileFileReference":59,"caption":294,"altText":60,"assetPagePath":295,"disableSharing":33,"imageControlIconColor":91,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--848c9298-a517-4f6d-b3ca-5a1ae78ea9e8/ap-chronicles-image.webp?preferwebp=true","1970. Audemars Piguet Showcase at the Basel Fair. Since the 1950s, Audemars Piguet has been recognised as one of the main experts in ultra-thin watches. In 1970, this status was confirmed by the launch of Calibre 2121, the thinnest in its category, which came to equip the Royal Oak two years later. Audemars Piguet Archives. ","/content/ap/chronicles/ww/en/assets/205_9_1",{"fileReference":297,"mobileFileReference":59,"caption":298,"altText":299,"assetPagePath":300,"disableSharing":33,"imageControlIconColor":91,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--4c41ecad-890d-44d5-8fa1-36c528bda274/ap-chronicles-image.webp?preferwebp=true","1975. Text box of LeCoultre & Cie plan N° 21886. The different references used by each company for the same calibres are listed on the left of the plan number: - Audemars Piguet 2120 and 2121; - LeCoultre & Cie 920 (without date) and 921 (with date); - Patek Philippe 28.255 and 28.255c; - Vacheron Constantin 1120 and 1121. The document indicates the transformation dates for the component marked as \"\"completed plate\"\", the first drawing of which was done in 1961. Its first transformation took place in 1975. Audemars Piguet Archives. ","1975. Text box of LeCoultre & Cie plan N° 21886. ","/content/ap/chronicles/ww/en/assets/205_9_2_v3","apchronicles/components/twoimages",[94,151,303],"twoimages",{"columnCount":5,"gridClassNames":6,"columnClassNames":305,":items":306,":itemsOrder":362,":type":96},{"textcarousel_195651893":8,"title":8,"carousel":8,"table":8},{"title":307,"textcarousel_195651893":310,"carousel":343,"table":360},{"id":308,"linkDisabled":33,"type":75,"text":309,":type":77},"title-06e3c337e0","Regulating Organ Developments",{"text":311,"images":312,"imageControlIconColor":91,":type":92},"\u003Cp>Calibre 2120 and its derivative Calibre 2121 have continued to evolve since 1967. The first years required numerous adjustments. The balance staff, for example, was redesigned six times in the period up to 1971! These multiple redesigns can be explained by the difficulty of creating an extremely thin regulating organ that was still large enough to ensure perfect reliability.\u003C/p>\r\n\u003Cp>At the heart of the regulating organ is the balance. This component performs a to-and-fro motion around a central axis that determines the tick-tock cadence of the watch. Its regularity is essential to ensuring accuracy. In 1967, Calibre 2120 was equipped with a "variable inertia" balance fitted on its periphery with small inertia-blocks (off-centred weights). The adjuster turns these weights manually to modify the speed of the balance and compensate for the gain or loss of the watch, somewhat like a figure skater who accelerates when spinning by tucking her arms closer to her body. The experienced eye will moreover note the blue balance spring.\u003C/p>\r\n\u003Cp>Between 1978 and 1980, the regulating organ evolved towards a simpler system. From then on, a three-armed annular balance was adjusted by means of an index (also known as a regulator) serving to modify the tension of the balance spring and the speed of oscillation. At the same time, Audemars Piguet simplified the aesthetics of the balance bridge. The mechanism was renamed Calibre 2120/1. While this major transformation streamlined production, it made the watchmakers’ work much trickier, to the point where – faced with recurring adjustment problems – Audemars Piguet reintroduced the variable-inertia balance in 1991. The mechanism was renamed Calibre 2120/3.\u003Cbr />\r\n\u003C/p>\r\n\u003Cp>Further improvements were made. For the attention of watchmakers, we should for example mention that in 2012 the angle of lift was reduced by three degrees and the pallet-lever bridge detent-pins were rectified. The following year, the barrel pivot was jewelled to eliminate wear caused by friction...\u003C/p>",[313,318,323,328,333,338],{"fileReference":314,"mobileFileReference":59,"caption":315,"altText":316,"assetPagePath":317,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--43323ca1-22e2-4bcb-9cce-60652472616f/ap-chronicles-image.webp?preferwebp=true","1967–2021. Regulating organs that equipped Calibres 2120 and 2121. Main balance-wheel and balance-coq aesthetic and technical evolutions. Top: since 1967; Middle: since circa 1980; Bottom: since circa 1991.","1967–2021. Regulating organs that equipped Calibres 2120 and 2121.","/content/ap/chronicles/ww/en/assets/205_10_1",{"fileReference":319,"mobileFileReference":59,"caption":320,"altText":321,"assetPagePath":322,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--583bbaec-0c55-48b9-b635-236853057c84/ap-chronicles-image.webp?preferwebp=true","1975. Plan 24361B of the three-arm circular balance wheel destined to Calibres 2120 and 2121. Sketched in January 1975, this balance wheel was used as early as 1978 in the Calibres 2120 and 2121. It was replaced by a variable inertia balance wheel at the beginning of the 1990s. Plan updated in 1996. Audemars Piguet Archives. ","1975. Plan 24361B of the three-arm circular balance wheel destined to Calibres 2120 and 2121. ","/content/ap/chronicles/ww/en/assets/205_10_2",{"fileReference":324,"mobileFileReference":59,"caption":325,"altText":326,"assetPagePath":327,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--3a8bee21-8614-4286-ac9f-2dfc3e8cd6c6/ap-chronicles-image.webp?preferwebp=true","1975. Plan 24367 of the balance-cock destined to Calibres 2120 and 2121. This balance-cock (or balance wheel bridge), whose aesthetic was simplified, replaced in 1978 and for a decade, the version introduced in 1967 in the very first version of Calibre 2120. Audemars Piguet Archives. ","1975. Plan 24367 of the balance-cock destined to Calibres 2120 and 2121. ","/content/ap/chronicles/ww/en/assets/205_10_3_v2",{"fileReference":329,"mobileFileReference":59,"caption":330,"altText":331,"assetPagePath":332,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--36bdb749-80f1-4e2c-a185-31aae15d00c5/ap-chronicles-image.webp?preferwebp=true","1967–circa 1978. Calibre 2120, first generation. Selfwinding ultra-thin Calibre. 22 mm in diameter (12½ lignes). Variable inertia balance wheel. Movement 112572, produced in 1970. Audemars Piguet Heritage. ","1967–circa 1978. Calibre 2120, first generation. ","/content/ap/chronicles/ww/en/assets/205_10_7_v2",{"fileReference":334,"mobileFileReference":59,"caption":335,"altText":336,"assetPagePath":337,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--d3405f41-7c50-48f3-866f-657163b3d747/ap-chronicles-image.webp?preferwebp=true","Circa 1978–circa 1991. Calibres 2120/1 (second generation). Selfwinding ultra-thin calibre. 28 mm in diameter (12½ lignes). Index-regulated, three-arm annular balance wheel. Movement 212825 produced in 1980. Audemars Piguet Archives. ","Circa 1978–circa 1991. Calibres 2120/1 (second generation). ","/content/ap/chronicles/ww/en/assets/205_10_8_v2",{"fileReference":339,"mobileFileReference":59,"caption":340,"altText":341,"assetPagePath":342,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--611e931c-759a-4868-9eed-adceb292dee3/ap-chronicles-image.webp?preferwebp=true","Circa 1991–circa 2012. Calibre 2120, third generation. Selfwinding ultra-thin calibre. 28 mm in diameter (12½ lignes). Index-regulated, three-arm annular balance wheel. Audemars Piguet Heritage.","Circa 1991–circa 2012. Calibre 2120, third generation.","/content/ap/chronicles/ww/en/assets/205_10_9_v2",{"images":344,"imageControlIconColor":91,":type":149},[345,350,355],{"fileReference":346,"mobileFileReference":59,"caption":347,"altText":348,"assetPagePath":349,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--6f5cc459-f32a-4db3-872e-72af105c8759/ap-chronicles-image.webp?preferwebp=true","From 1967 to circa 1978. Regulating organ of Calibres 2120 and 2121. Balance-coq with complex shape, gilded engraving. Variable inertia balance wheel, flat inertia-blocks, blue balance spring. Tight framing of Calibre 2120 (same aesthetic on the bridge side as Calibre 2121). Movement 112572 (1970). Audemars Piguet Heritage.","From 1967 to circa 1978. Regulating organ of Calibres 2120 and 2121. ","/content/ap/chronicles/ww/en/assets/205_10_4",{"fileReference":351,"mobileFileReference":59,"caption":352,"altText":353,"assetPagePath":354,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--8c36deaf-e962-4268-8f7e-6d9e5b4238af/ap-chronicles-image.webp?preferwebp=true","From circa 1978 to circa 1991. Regulating organ of Calibres 2120 and 2121. Simplified aesthetic of the balance-coq. Index-regulated, three-part annular balance wheel. Thight framing of Calibre 2120/2800 (same aesthetic on the bridge side as Calibre 2121). Movement 274327 (1986). Audemars Piguet Heritage. ","From circa 1978 to circa 1991. Regulating organ of Calibres 2120 and 2121. ","/content/ap/chronicles/ww/en/assets/205_10_2bis",{"fileReference":356,"mobileFileReference":59,"caption":357,"altText":358,"assetPagePath":359,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--82bd35f2-88a4-4627-ad14-d13b3426b89d/ap-chronicles-image.webp?preferwebp=true","From circa 1991 to circa 2021. Regulating organ of Calibres 2120 and 2121. Simplified aesthetic of the balance-coq, gilded engraving. Variable inertia balance wheel, flat inertia blocks. Tight framing of Calibre 2120 (same aesthetic on the bridge side as Calibre 2121). Movement 550677 (circa 2007). Audemars Piguet Archives. ","From circa 1991 to circa 2021. Regulating organ of Calibres 2120 and 2121. ","/content/ap/chronicles/ww/en/assets/205_10_6",{"content":31,":type":361},"apchronicles/components/table",[94,363,152,364],"textcarousel_195651893","table",{"columnCount":5,"gridClassNames":6,"columnClassNames":366,":items":367,":itemsOrder":389,":type":96},{"textcarousel":8,"title":8},{"title":368,"textcarousel":371},{"id":369,"linkDisabled":33,"type":75,"text":370,":type":77},"title-e509a16036","The Art of Openworking: Reviving a Meticulous Skill",{"text":372,"images":373,"imageControlIconColor":91,":type":92},"\u003Cp>During the early years of its history, Calibre 2120 and its derivatives remained hidden, well protected inside watch cases. Only watchmakers could admire them when performing services or repairs. The arrival of quartz overturned such codes and the mechanical content of a watch could no longer be taken for granted. It was time to highlight traditional expertise and reveal the beating heart of the watch. To do so, Audemars Piguet decided to reintroduce an art in which the brand had excelled in the 1930s and 50s, but which had all but vanished from the workshops: openworking, also referred to as skeletonisation.\u003C/p>\r\n\u003Cp>This art consists of using a tiny hacksaw to remove as much material as possible from the movement bridges so as to reveal its mysteries without impairing its functions, before decorating each component by hand. Openworking is time-consuming and requires considerable manual dexterity. It was introduced during the depression of the 1930s, in order to keep watchmakers busy following the steep drop in orders. In 1972, the situation was different. First and foremost, it was a matter of highlighting the beauty of mechanical movements faced with the advent of quartz. Audemars Piguet decided to create a workshop dedicated to this art and relied on the experience of its veterans to train the new generation of artisans. Of the 86 employees, nine watchmakers had been working for the Manufacture for at least 20 years. Two of them were already at the bench in 1930, including Paul Edward Piguet, son of the company’s co-founder.\u003C/p>",[374,379,384],{"fileReference":375,"mobileFileReference":59,"caption":376,"altText":377,"assetPagePath":378,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--494f9528-e0c0-4943-a67b-6a17f8b069f7/ap-chronicles-image.webp?preferwebp=true","1936. Openworked pocket watch. Ultra-thin openworked and engraved Calibre 16½SVF#3. Blue-lacquered dial. Movement and case 38628. Crystal and platinum. Pre-Model 623. Sold in May 1936 to Dunhill Ltd. Private collection.","1936. Openworked pocket watch. ","/content/ap/chronicles/ww/en/assets/205_11_1",{"fileReference":380,"mobileFileReference":59,"caption":381,"altText":382,"assetPagePath":383,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--15818c80-f9e3-4537-a239-59a93ef97d2c/ap-chronicles-image.webp?preferwebp=true","1937. Openworked wristwatch. Openworked Calibre 10TS. Gold openworked dial. Movement and case 42699 in 18-carat gold. Pre-Model 556-557. Sold to Bucherer in January 1937. Audemars Piguet Heritage, inv 1285. ","1937. Openworked wristwatch. ","/content/ap/chronicles/ww/en/assets/205_11_2",{"fileReference":385,"mobileFileReference":59,"caption":386,"altText":387,"assetPagePath":388,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--d39cc961-2385-46d0-8d45-ac2b05002fe8/ap-chronicles-image.webp?preferwebp=true","1963. Openworked wristwatch 5036. Openworked and engraved Calibre 10TS, movement 63476 (blank 1953). Hour-marker on the bezel. Case no. 21954 in 18-carat white gold. Sold to Union Relojeria in February 1963. Audemars Piguet Heritage, in. 1729.","1963. Openworked wristwatch 5036. ","/content/ap/chronicles/ww/en/assets/205_11_3",[94,95],{"columnCount":5,"gridClassNames":6,"columnClassNames":391,":items":392,":itemsOrder":441,":type":96},{"textcarousel":8,"twoimages":8,"title":8},{"title":393,"textcarousel":396,"twoimages":429},{"id":394,"linkDisabled":33,"type":75,"text":395,":type":77},"title-b7946b2a25","First Openworked Models",{"text":397,"images":398,"imageControlIconColor":91,":type":92},"\u003Cp>It was during the winter of 1972 – 1973 that a few young watchmakers set about rediscovering openworking, undoubtedly aided and abetted by their elders. Georges Golay’s vision was ambitious, as the operation kicked off with a hundred examples of Calibre 2120. The first watch was delivered on November 31, 1973. A masterpiece of meticulous craftsmanship and fine detail, Model 5442 provided a complex stage-setting for its mechanism. Through the caseback, the openworked oscillating weight revealed the AP monogram, in a pattern that would inspire the weights of Calibres 2120, 2121 and 2120/2800 for decades. Five more timepieces were delivered in December and an average of 30 watches were produced annually until 1976.\u003C/p>\r\n\u003Cp>In the 1970s, it took a trained craftsman 150 hours to openwork a Calibre 2120. The workshop therefore had to expand. It took three years to complete the first 100 watches. While the same period of time was required for the next hundred, Audemars Piguet had in parallel decided to openwork Calibre 2003, which was even smaller than the 2120. In 1978, 300 openworked watches fitted with Calibre 2120 were produced. In 1984, the workshop already had a dozen artisans entirely dedicated to the art of openworking.\u003Cbr />\r\n\u003C/p>\r\n\u003Cp>Openworking was introduced into the Royal Oak collection in 1986, through Model 25636 equipped with a perpetual calendar. A pendant pocket watch version followed in the 1980s, Model 25729. In 1992, Models 14815, 14816 and 14929 introduced their openworked Calibre 2003. From then on, while evolving stylistically, the openworking speciality became an integral part of the Royal Oak collection, which included more than 40 models created between 1992 and 2022, four of which were fitted with Calibre 2120: Models 14814, 15052, 15053 and 15136.\u003C/p>",[399,404,409,414,419,424],{"fileReference":400,"mobileFileReference":59,"caption":401,"altText":402,"assetPagePath":403,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--d3222fb9-f3b4-4c8e-b102-3459c5f89131/ap-chronicles-image.webp?preferwebp=true","1976. Ultra-thin openworked wristwatch 5442BA (1972). Calibre 2120SQ, movement 136093 belonging to the first batch of 100 openworked movement blanks for Calibre 2120. Case B4502. 18-carat yellow gold. Sold in Germany in 1976. Audemars Piguet Heritage, inv. 1123.","1976. Ultra-thin openworked wristwatch 5442BA (1972). ","/content/ap/chronicles/ww/en/assets/205_12_2",{"fileReference":405,"mobileFileReference":59,"caption":406,"altText":407,"assetPagePath":408,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--493ce02f-6dcf-40e1-91ec-3919b8366d2f/ap-chronicles-image.webp?preferwebp=true","1976. Ultra-thin openworked wristwatch 5442BA (1972), caseback view. Calibre 2120SQ, movement 136093 belonging to the first batch of 100 openworked movement blanks for Calibre 2120. Case B4502. 18-carat yellow gold. Sold in Germany in 1976. Audemars Piguet Heritage, inv. 1123.","1976. Ultra-thin openworked wristwatch 5442BA (1972), caseback view. ","/content/ap/chronicles/ww/en/assets/205_12_3",{"fileReference":410,"mobileFileReference":59,"caption":411,"altText":412,"assetPagePath":413,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--4bbb6cf2-3c88-4e8f-83b3-bd14f8f81674/ap-chronicles-image.webp?preferwebp=true","1980. Octagonal openworked wristwatch 4122BA. Calibre 2120SQ, movement 174862. Case B38196 in 18-carat yellow gold. Sold to Darcal (Swiss market) in September 1980. Audemars Piguet Heritage, inv. 1788.","1980. Octagonal openworked wristwatch 4122BA. ","/content/ap/chronicles/ww/en/assets/205_12_4",{"fileReference":415,"mobileFileReference":59,"caption":416,"altText":417,"assetPagePath":418,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--ab7575cb-5daa-433e-9913-3819f140d5c1/ap-chronicles-image.webp?preferwebp=true","1993. Haute Joaillerie wristwatch 14771BA. Watchmakers, openworking specialists, engravers, jewellers, gemsetters and artistic chain-makers combine their traditional skills here. Calibre 2003SQ in gold, movement 275389 (blank 1988). Gemset hands. Case C71668 in 18-carat yellow gold. 56 baguette-cut diamonds (~1.64 carats). Sold in Hong Kong in 1993. Audemars Piguet Heritage, inv. 1210.","1993. Haute Joaillerie wristwatch 14771BA. ","/content/ap/chronicles/ww/en/assets/205_12_6",{"fileReference":420,"mobileFileReference":59,"caption":421,"altText":422,"assetPagePath":423,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--c629a6fe-b4a7-4e61-ade5-241b5539417f/ap-chronicles-image.webp?preferwebp=true","1997. Openworked Royal Oak 14814BA. Date. Calibre 2120SQ, movement 367889, entirely openworked and gilded. Bracelet 944. Diamond-set hands. Case D93405, 39 mm. 18-carat yellow gold. Audemars Piguet Heritage, inv. 1216.","1997. Openworked Royal Oak 14814BA. ","/content/ap/chronicles/ww/en/assets/205_12_7",{"fileReference":425,"mobileFileReference":59,"caption":426,"altText":427,"assetPagePath":428,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--8c073cc9-a028-4eeb-b363-0f717b260b2c/ap-chronicles-image.webp?preferwebp=true","2012. Royal Oak 15203PT 3/4. Prototype P795 presented in 2012 at the SIHH (Salon International de la Haute Horlogerie) in Geneva. Date. Calibre 5122. Openworked and blackened, movement 822289. Case P00795, 39 mm. Limited edition of 40 in platinum. Anniversary oscillating weight. Audemars Piguet Heritage, inv. 1336.","2012. Royal Oak 15203PT 3/4. ","/content/ap/chronicles/ww/en/assets/205_12_8",{"images":430,":type":301},[431,436],{"fileReference":432,"mobileFileReference":59,"caption":433,"altText":434,"assetPagePath":435,"disableSharing":33,"imageControlIconColor":91,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--735b137b-2615-4d3c-bc1a-b953a83e08eb/ap-chronicles-image.webp?preferwebp=true","1975. Ad for the Royal Oak 5402ST and 5442BA. In the midst of the quartz crisis, these two models forged a new path. The 5402ST created a new \"\"sport chic\"\" segment with its unconventional body of hand-finished steel, while Model 5442BA emphasised ancestral techniques. Audemars Piguet Archives. ","1975. Ad for the Royal Oak 5402ST and 5442BA. ","/content/ap/chronicles/ww/en/assets/205_12_1",{"fileReference":437,"mobileFileReference":59,"caption":438,"altText":439,"assetPagePath":440,"disableSharing":33,"imageControlIconColor":91,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--4870076a-33cc-4236-a0a7-fe6e7f92e9f0/ap-chronicles-image.webp?preferwebp=true","1984. Openworking workshop. To accompany the renewal of openworking, Audemars Piguet has created a workshop entirely dedicated to this art. Audemars Piguet Archives. ","1984. Openworking workshop. ","/content/ap/chronicles/ww/en/assets/205_12_5",[94,95,303],{"columnCount":5,"gridClassNames":6,"columnClassNames":443,":items":444,":itemsOrder":487,":type":96},{"title":8,"carousel":8,"textimage":8},{"title":445,"textimage":448,"carousel":455},{"id":446,"linkDisabled":33,"type":75,"text":447,":type":77},"title-187422e117","Sapphire Caseback and Decorated Oscillating Weights",{"text":449,"image":450,"imageControlIconColor":91,":type":193},"\u003Cp>Although it enhances the beauty of watch mechanisms, openworking can only be applied to small series, as it requires a considerable amount of time: nearly one month for a single movement. As an interesting alternative, a sapphire caseback reveals only the reverse side of the movement, which watchmakers call the “bridge side”, as opposed to the “dial side”. While a sapphire caseback does not require openworking the movement, hand-engraved bridges or special oscillating weights often accompanied its earliest occurrences.\u003C/p>\r\n\u003Cp>Before the 1990s, there were very few non-openworked watches with sapphire casebacks. The Heritage Collection has only one example, Model 5283. The story really begins in 1992, when the Royal Oak celebrated its 20\u003Csup>th\u003C/sup> anniversary. To mark the occasion, Stephen Urquhart and Georges-Henri Meylan, who had been joint managing directors of the company since the death of Georges Golay in 1987, decided to revive the legendary \u003Ca href=\"/en/article/the-royal-oak-jumbo-models\">Royal Oak "Jumbo"\u003C/a> equipped with Calibre 2121. Model 14802 staged its rotor behind a sapphire crystal. The oscillating weight was specially designed for the jubilee and bore the engraving of the small Royal Oak number (\u003Ca href=\"/en/article/royal-oak-numbering\">see the article on numbering\u003C/a>). Issued in a 1,000-piece limited edition, it was so successful that in 1996, the Royal Oak “Jumbo” returned to the current collection, Model 15002, this time with a solid caseback.\u003C/p>",{"fileReference":451,"mobileFileReference":59,"caption":452,"altText":453,"assetPagePath":454,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--90c1d7a8-fe29-4c1f-bf1a-a3e59e44ae79/ap-chronicles-image.webp?preferwebp=true","Circa 1990. Sketch of anniversary oscillating weights for the Royal Oak 14802. Gouache drawing on translucent paper. Audemars Piguet Archives. ","Circa 1990. Sketch of anniversary oscillating weights for the Royal Oak 14802. ","/content/ap/chronicles/ww/en/assets/205_13_1",{"images":456,"imageControlIconColor":91,":type":149},[457,462,467,472,477,482],{"fileReference":458,"mobileFileReference":59,"caption":459,"altText":460,"assetPagePath":461,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--5cfa2937-b377-4910-a58d-49a59a541676/ap-chronicles-image.webp?preferwebp=true","1993. Royal Oak 14802ST (1992), No. 130, caseback view. Date. Calibre 2121, movement 374378. Bracelet 944. T21 Tapisserie dial. Steel. Sold in 1993 to Elco (United Kingdom). Audemars Piguet Heritage, inv. 1051.","1993. Royal Oak 14802ST (1992), No. 130, caseback view. ","/content/ap/chronicles/ww/en/assets/205_13_2_v2",{"fileReference":463,"mobileFileReference":59,"caption":464,"altText":465,"assetPagePath":466,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--cde22547-f3bc-4312-9c1d-7e9a07b2dcd5/ap-chronicles-image.webp?preferwebp=true","1993. Royal Oak 14802ST (1992), No. 130. Date. Calibre 2121, movement 374378. Bracelet 944. T21 Tapisserie dial. Case D12288, 39 mm. Steel. Sold in 1993 to Elco (United Kingdom). Audemars Piguet Heritage, inv. 1051.","1993. Royal Oak 14802ST (1992), No. 130. ","/content/ap/chronicles/ww/en/assets/205_13_3_v2",{"fileReference":468,"mobileFileReference":59,"caption":469,"altText":470,"assetPagePath":471,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--ad038200-84e5-4b5f-9d5e-30277c3b8fb8/ap-chronicles-image.webp?preferwebp=true","1994. Royal Oak Perpetual Calendar 25686SP, caseback view. Perpetual calendar: day, date, month, moon phase. Ultra-thin Calibre 2120/2800 (3.95 mm). Movement 374056. Bracelet 944. 39 mm case D41976, limited edition 6/25. Steel and platinum. Audemars Piguet Heritage, inv. 1046.","1994. Royal Oak Perpetual Calendar 25686SP, caseback view. ","/content/ap/chronicles/ww/en/assets/205_13_4_v2",{"fileReference":473,"mobileFileReference":59,"caption":474,"altText":475,"assetPagePath":476,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--0fcb14ea-543c-421e-9a16-306f111178ea/ap-chronicles-image.webp?preferwebp=true","1994. Royal Oak Perpetual Calendar 25686SP. Perpetual calendar: day, date, month, moon phase. Calibre 2120/2800 ultra-thin (3.95 mm). Movement 374056. Bracelet 944. Case D41976, 39 mm, limited edition 6/25. Steel and platinum. Audemars Piguet Heritage, inv. 1046.","1994. Royal Oak Perpetual Calendar 25686SP.","/content/ap/chronicles/ww/en/assets/205_13_5_v2",{"fileReference":478,"mobileFileReference":59,"caption":479,"altText":480,"assetPagePath":481,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--846db6b2-c891-4a9a-a61e-15235cb7e1f2/ap-chronicles-image.webp?preferwebp=true","2002. Royal Oak 15202ST (2000), No. 557, caseback view. Date. Calibre 2121, movement 506507. Bracelet 944. Grande Tapisseriedial. Case E66948, 39 mm. Steel. Sold in 2002 to AP Germany. Audemars Piguet Heritage, inv. 738.","2002. Royal Oak 15202ST (2000), No. 557, caseback view. ","/content/ap/chronicles/ww/en/assets/205_13_6_v2",{"fileReference":483,"mobileFileReference":59,"caption":484,"altText":485,"assetPagePath":486,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--7e00c79c-3c3e-48af-bbcb-4365c6954bb4/ap-chronicles-image.webp?preferwebp=true","2002. Royal Oak 15202ST (2000), No. 557. Date. Calibre 2121, movement 506507. Bracelet 944. Grande Tapisserie dial. Case E66948, 39mm. Steel. Sold in 2002 to AP Germany. Audemars Piguet Heritage, inv. 738.","2002. Royal Oak 15202ST (2000), No. 557. ","/content/ap/chronicles/ww/en/assets/205_13_7_v2",[94,195,152],{"columnCount":5,"gridClassNames":6,"columnClassNames":489,":items":490,":itemsOrder":517,":type":96},{"text":8,"title":8,"carousel":8},{"title":491,"text":494,"carousel":496},{"id":492,"linkDisabled":33,"type":75,"text":493,":type":77},"title-6edc49495b","Evolution in the 21st Century",{"text":495,":type":126},"\u003Cp>In 2000, the world celebrated a new millennium and Audemars Piguet its 125\u003Csup>th\u003C/sup> anniversary. At the same time, the brand-new Royal Oak “Jumbo” 15202 with its white “Grande Tapisserie” dial definitively adopted the sapphire caseback. The oscillating weight with its arabesque motif was inspired by the first openworked Calibre 2120 introduced in 1973 (see above). Informed connoisseurs will have noted that, as early as 1986, Royal Oak perpetual calendar watches equipped with Calibre 2120/2800 had already adopted this highly decorative rotor, in particular on Models 25636 and 25686.\u003C/p>\r\n\u003Cp>The third key milestone in this evolution appeared at the best possible time, coinciding with the Royal Oak’s 40\u003Csup>th\u003C/sup> anniversary. In 2012, an exhibition celebrating both contemporary art and the history of the Royal Oak travelled to New York and Milan before bringing together in Geneva the 1,000 employees then working on the brand's development. The aesthetics of the 15202's rotor were modernised, with arabesques giving way to angles and facets, accentuated by a double-row “Clous de Paris” pattern. The oscillating weight echoed the watch’s artistic expression and this aesthetic was preserved in Calibre 5134 which replaced Calibre 2120/2800 in 2015 and in the openworked Calibre 5122 released in 2014.\u003Cbr />\r\n\u003C/p>",{"images":497,"imageControlIconColor":91,":type":149},[498,502,507,512],{"fileReference":499,"mobileFileReference":59,"caption":500,"altText":485,"assetPagePath":501,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--466f5350-eaf6-477a-bb46-7de8a53f3363/ap-chronicles-image.webp?preferwebp=true","2007–2019. Calibres 2120 and 2121, caseback side. This openworked oscillating weight is documented in the Audemars Piguet catalogues between 2007 and 2012 for Calibre 2121 and between 2011 and 2019 for Calibre 2120. It was also probably used before and after these dates.","/content/ap/chronicles/ww/en/assets/205_14_1_v3",{"fileReference":503,"mobileFileReference":59,"caption":504,"altText":505,"assetPagePath":506,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--97eb8751-4d46-49c8-9a15-2b8c0f655ea0/ap-chronicles-image.webp?preferwebp=true","2012. Royal Oak 15202ST, caseback view. This variation of the 15202 (2000) model entered the collection on the occasion of the Royal Oak's 40th anniversary. Date. Calibre 2121, movement 694734. Petite Tapisserie dial with AP monogram at 6 o'clock. Case H51272, 39mm, small number 3655. Steel. Audemars Piguet Heritage, inv. 1279.","2012. Royal Oak 15202ST, caseback view. ","/content/ap/chronicles/ww/en/assets/205_14_2",{"fileReference":508,"mobileFileReference":59,"caption":509,"altText":510,"assetPagePath":511,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--07bdf752-b354-40a1-a2ec-d009aef567a9/ap-chronicles-image.webp?preferwebp=true","2015. Calibre 5134, caseback side. The extra-thin perpetual calendar Calibre 2120/2800 was replaced in 2015 with a more performant version, which retained a similar aesthetic. Picture taken at the calibre's launch. Audemars Piguet Archives.","2015. Calibre 5134, caseback side. ","/content/ap/chronicles/ww/en/assets/205_14_3_v3",{"fileReference":513,"mobileFileReference":59,"caption":514,"altText":515,"assetPagePath":516,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--586f4e50-4878-47d8-ba17-fc22f56f1813/ap-chronicles-image.webp?preferwebp=true","2022. Calibre 7121. Introduced on the occasion of the Royal Oak's 50th anniversary, Calibre 7121 replaces the legendary 2121, which equipped all previous \"\"Jumbo\"\" models. 29.6 mm in diameter (12¾ lignes), 3.2 mm in height, 55 hours power reserve, 33 jewels. Picutre taken by Audemars Piguet for the launch of Model 16202.","2022. Calibre 7121. Introduced on the occasion of the Royal Oak's 50th anniversary.","/content/ap/chronicles/ww/en/assets/205_14_4",[94,151,152],{"columnCount":5,"gridClassNames":6,"columnClassNames":519,":items":520,":itemsOrder":531,":type":96},{"title":8,"textimage":8},{"title":521,"textimage":524},{"id":522,"linkDisabled":33,"type":75,"text":523,":type":77},"title-bb4bc319d9","Calibre 2121 Production Moved to Le Brassus",{"text":525,"image":526,"imageControlIconColor":91,":type":193},"\u003Cp>The history of Calibre 2120 and its derivative 2121 almost petered out at the end of the 1990s. During that decade, this mechanical masterpiece was almost exclusively used in the rare Royal Oak “Jumbo” watches still made by Audemars Piguet, in particular Models 14802 (1992) and 15002 (1996) as well as the 2120/2801-2 perpetual calendar versions. However, sales slowly declined due to the ascending popularity of Royal Oak Offshore and complication timepieces. As a result, the stock of unfinished blanks swelled to almost 400 units by 1999 and year after year, the flow of orders to Jaeger-LeCoultre gradually dwindled to a mere trickle.\u003C/p>\r\n\u003Cp>Wilfred Berney, founder of Audemars Piguet’s Customer Service Department in 1976, wrote a memoir about Calibre 2120/2800 just before he retired in 2007. The document states that: “In 1999, Jaeger-LeCoultre informed AP of its decision to cease the production of blanks for this movement.” This change was part of the reshaping of the Swiss watch industry, which notably saw the integration of Jaeger-LeCoultre into the Richemont group.\u003C/p>\r\n\u003Cp>At Audemars Piguet, the vertical integration of production was already a core concern. It led to Calibre 3090 in 1999, by which time the fourth generation of the founding families had taken its place on the Board of Directors. Jasmine Audemars and Olivier Audemars wished to accelerate the process. The integration of Calibre 2120 almost represented a welcome opportunity, or at least a priority. Wilfred Berney writes that “despite major difficulties”, the project was completed in 2002. This statement is supported by the large number of plans for the Calibres 2120 and 2121 drawn up by the Audemars Piguet Technical Department as early as 2000.\u003C/p>\r\n\u003Cp>Bruno Moutarlier, who served as Industrial Director for Audemars Piguet between 2004 and 2006, testified in an October 2020 interview that Jaeger-LeCoultre had simultaneously given up producing the 2003 Calibre: “There were discussions with Vacheron Constantin.” The two companies are thought to have divided the calibres between them, with the Geneva-based firm taking over the production of the ultra-thin hand-wound movement designed in 1953 and Audemars Piguet handling Calibre 2120 and its derivatives, while supplying components to Patek Philippe’s customer service. In this way, the former \u003Ci>établisseurs\u003C/i> became the manufacturers.\u003C/p>\r\n\u003Cp>In 2022, after 55 years of loyal service, Calibre 2120 and its derivative Calibre 2121 gave way to a new generation. Benefiting from the latest technical advances and developed by Audemars Piguet engineers and watchmakers, Calibre 7121 heralds a new chapter in the history of ultra-thin selfwinding mechanisms.\u003C/p>\r\n\u003Cp> \u003C/p>\r\n\u003Cp>\u003Ci>Editorial board: Audemars Piguet Heritage team, Le Brassus\u003C/i>\u003C/p>\r\n\u003Cp>\u003Ci>First publication: 14 April 2022\u003C/i>\u003C/p>\r\n\u003Cp> \u003C/p>",{"fileReference":527,"mobileFileReference":59,"caption":528,"altText":529,"assetPagePath":530,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--5dcc9d82-bd2c-425f-85b5-7f1769b09475/ap-chronicles-image.webp?preferwebp=true","2000. Jacques-Louis Audemars and his daughter Jasmine Audemars. Third and fourth generation of the Audemars family since the foundation of the company in 1875, Jacques-Louis and his daughter take the pose in front of the social headquarters at the Route de France 16 in the village of Le Brassus for the company's 125th anniversary. Audemars Piguet Archives. ","2000. Jacques-Louis Audemars and his daughter Jasmine Audemars. ","/content/ap/chronicles/ww/en/assets/205_15_1_v2",[94,195],[533,534,535,536,537,538,539,540,541,542,543,544,545,546,547],"chapter","chapter_1478566286","chapter_1410659955","chapter_988370665","chapter_1791991346","chapter_1950593201","chapter_1460461618","chapter_1980700024","chapter_722469325","chapter_1002658938","chapter_1754068840","chapter_1015996552","chapter_1511352160","chapter_1038748431","chapter_1423412496","apchronicles/components/container",{"relatedContent":550,":type":793},[551,558,565,572,578,583,589,594,599,604,610,616,621,627,633,638,643,648,653,658,664,669,674,679,684,689,694,699,704,709,714,719,724,729,734,739,744,749,754,760,765,771,777,782,788],{"title":552,"path":553,"image":554,"duration":556,"templateType":557},"Calibre 2121","/content/ap/chronicles/ww/en/calibres/2121",{"fileReference":555,"mobileFileReference":555,"caption":31,"altText":31,"assetPagePath":31,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--1c329cc5-f9f8-4d3e-94ba-9e0dba2e501d/ap-chronicles-image.webp?preferwebp=true","1","page-calibre",{"title":559,"path":560,"image":561,"duration":564,"templateType":28},"The Royal Oak “Jumbo” Models","/content/ap/chronicles/ww/en/articles/the-royal-oak-jumbo-models",{"fileReference":562,"mobileFileReference":563,"caption":31,"altText":31,"assetPagePath":31,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--c2fbb5d7-7136-4f84-bc96-1a21b675c9ff/ap-chronicles-image.webp?preferwebp=true","/adobe/dynamicmedia/deliver/dm-aid--6b2fc171-9da8-4bc5-a247-baf9e5331094/ap-chronicles-image.webp?preferwebp=true","25",{"title":566,"path":567,"image":568,"duration":570,"templateType":571},"5402, First Royal Oak Model","/content/ap/chronicles/ww/en/models/5402",{"fileReference":569,"mobileFileReference":569,"caption":31,"altText":31,"assetPagePath":31,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--e7712448-6499-4cfb-844f-50db6259388d/ap-chronicles-image.webp?preferwebp=true","5","page-model",{"title":573,"path":574,"image":575,"duration":577,"templateType":28},"Birth of an Icon","/content/ap/chronicles/ww/en/articles/birth-of-an-icon",{"fileReference":576,"mobileFileReference":576,"caption":31,"altText":31,"assetPagePath":31,"disableSharing":33,"imageControlIconColor":31,"title":31,":type":34},"/adobe/dynamicmedia/deliver/dm-aid--c5f01d0c-9c84-478e-aabd-e4dd12b40f54/ap-chronicles-image.webp?preferwebp=true","80",{"title":579,"path":580,"image":581,"duration":50,"templateType":28},"Model 5402 Dial 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