\r\n\u003C/p>\r\n\u003Cp>Just under 9,000 units were produced between 1977 and 1984, the most productive years being 1987–1981 with an annual average of around 1,800 movements. Major improvements were made in 1979, leading to the creation of the 2123/1 variation (different mainplate, new pull-out piece, barrel bridge, yoke spring, etc.).\u003C/p>\r\n\u003Cp>Calibre 2123 heralded the long history of Audemars Piguet 11½-\u003Ci>ligne\u003C/i> (26 mm) selfwinding calibres based on a LeCoultre & Cie blank. In 1983, the second generation kicked off with Calibre 2124, followed by its derivatives 2124/2810, 2124/2815, 2124/2825, 2124/2812, 2125, 2126, 2126/2840 and 2129/2845. The third generation was born in 1996 with Calibre 2224, also accompanied by multiple derivatives 2224/2810, 2224/2815, 2224/2811, 2224/2812, 2224/2814, 2225, 2226, 2226/2840, 2226/2841, 2226/2839, 2127/2827, 2229/2845. 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Calibre 2123 has an indirect-drive seconds hand. Technical guide technique for watchmaker repairers. Audemars Piguet Archives.","Illustration of Calibre 2122 and its derived version Calibre 2123 from technical guide technique for watchmaker repairers, circa 1985","/content/ap/chronicles/ww/en/assets/2122-2123-fiche-techniquev20",{"fileReference":98,"mobileFileReference":83,"caption":99,"altText":100,"assetPagePath":101,"disableSharing":32,"imageControlIconColor":30,"title":30,":type":33},"/adobe/dynamicmedia/deliver/dm-aid--c4bd64f3-f841-471e-9938-5b871afd5606/ap-chronicles-image.webp?preferwebp=true","1977. Calibre 2123. Audemars Piguet 1979–1980 catalogue. 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