CALIBRES 2120/2800 and 2120/2800SQ
1978–1996. Calibre 2120/2800, dial side. Thinnest selfwinding perpetual calendar of its time (3.95 mm): day, date, month, moon phase. Movement 386456, made in 1995. Audemars Piguet Heritage, inv. 2010.
1978–1996. Calibre 2120/2800. Thinnest selfwinding perpetual calendar of its time (3.95 mm): day, date, month, moon phase. Movement 386456, made in 1995. Audemars Piguet Heritage, inv. 2010.
1978. First occurrence of Model 5548 equipped with Calibre 2120/2800. 1978–79 Audemars Piguet catalogue. Audemars Piguet Archives.
2008. Customer Service Technical information for Calibre 2120/2800. Technical information drawn up by Audemars Piguet Customer Service in 2008, relating to the maintenance of Calibre 2120/2800 (1978–1996). Excerpt. Audemars Piguet Archives.
Circa 1984. Royal Oak Perpetual Calendar 5554ST. Perpetual calendar: day, date, month and moon phase. Ultra-thin Calibre 2120/2800 (3.95 mm). Bracelet 344. Silver-toned dial. 39 mm case D1486, no. 37 (the first 50 5554ST cases were taken from the D series, Model 5402ST). Prototype without movement presented at the model launch. Audemars Piguet Heritage, inv. 455.
March 24, 1977. Technical drawing of a moon disc intended for Calibre 2120/2800. Polished and enamelled copper-beryllium. Audemars Piguet Archives.
1982-1996. Calibre 2120/2800SQ, dial side. Thinnest openworked selfwinding perpetual calendar of its time (3.95 mm): day, date, month, moon phase. Movement 324301, made in 1991. Audemars Piguet Heritage, inv. 723
1982–1996. Calibre 2120/2800SQ, bridge side. Thinnest openworked selfwinding perpetual calendar of its time (3.95mm): day, date, month, moon phase. Movement 324301, made in 1991. Audemars Piguet Heritage, inv. 723.
1978–1996. Production table of the perpetual calendar Calibre 2120/2800 and its openworked variant 2120/2800SQ. Audemars Piguet Archives.
Mechanism
Selfwinding with 21-carat oscillating weight, variable-inertia balance wheel
Functions
Hours, minutes, perpetual calendar: date, day, month and moon phase
Diameter
28 mm (12½ lignes)
Thickness
3.95 mm (some occurrences in 4.00 mm)
Frequency
19,800 vph (2.75 Hz)
Power Reserve
Approx. 40 h
Jewels
38
Dates
1978 – circa 1996
Movement Blank
LeCoultre & Cie (movement) and Dubois-Dépraz (underdial work)
Calibre 2120/2800 was created at Audemars Piguet by three watchmakers who wanted to give a new lease of life to horological complications. At the time, the Swiss watch industry was experiencing the "quartz crisis," the most serious in its history.
The thinnest selfwinding perpetual calendar of its time, Calibre 2120/2800 was first fitted inside Model 5548 designed by Jacqueline Dimier. It met with extraordinary success, resulting in more than 2,000 timepieces being produced. Numerous variations were created in several collections. In 1984, the calibre equipped the first Royal Oak Perpetual Calendar, Model 5554, soon followed by other references in this collection, notably: 25636, 25654, 25687, 25688, 25694, 25686, 25775, 25659 and 25773.
Total sales (excluding openworked versions): 6,508 units, of which: 4 (1978), 113 (1979), 154 (1980), 238 (1981), 278 (1982), 431 (1983), 441 (1984), 550 (1985), 588 (1986), 543 (1987), 605 (1988), 561 (1989), 550 (1990), 435 (1991), 354 (1992), 294 (1993), 227 (1994), 124 (1995) and 18 (1996).
Sales of 2120/2800SQ openworked variants: approx. 791 units, of which: 21 (1982), 33 (1983), 42 (1984), 35 (1985), 37 (1986), 85 (1987), 67 (1988), 60 (1989), 59 (1990), 56 (1991), approx. 50 (1992), 73 (1993), 88 (1994), 68 (1995) and 17 (1996).
Calibres derived from Calibre 2120/2800: 2120/2801, 2120/2802, 2120/2803, 2120/2804 and 2120/2808
Calibre 2120/2800 was created at Audemars Piguet by three watchmakers who wanted to give a new lease of life to horological complications. At the time, the Swiss watch industry was experiencing the "quartz crisis," the most serious in its history.
The thinnest selfwinding perpetual calendar of its time, Calibre 2120/2800 was first fitted inside Model 5548 designed by Jacqueline Dimier. It met with extraordinary success, resulting in more than 2,000 timepieces being produced. Numerous variations were created in several collections. In 1984, the calibre equipped the first Royal Oak Perpetual Calendar, Model 5554, soon followed by other references in this collection, notably: 25636, 25654, 25687, 25688, 25694, 25686, 25775, 25659 and 25773.
Total sales (excluding openworked versions): 6,508 units, of which: 4 (1978), 113 (1979), 154 (1980), 238 (1981), 278 (1982), 431 (1983), 441 (1984), 550 (1985), 588 (1986), 543 (1987), 605 (1988), 561 (1989), 550 (1990), 435 (1991), 354 (1992), 294 (1993), 227 (1994), 124 (1995) and 18 (1996).
Sales of 2120/2800SQ openworked variants: approx. 791 units, of which: 21 (1982), 33 (1983), 42 (1984), 35 (1985), 37 (1986), 85 (1987), 67 (1988), 60 (1989), 59 (1990), 56 (1991), approx. 50 (1992), 73 (1993), 88 (1994), 68 (1995) and 17 (1996).
Calibres derived from Calibre 2120/2800: 2120/2801, 2120/2802, 2120/2803, 2120/2804 and 2120/2808
