Calibre 2120/2801
1995-2000. Calibre 2120/2801 as seen from the dial side. Image from the AP. Audemars Piguet Archives.
1995-2000. Calibre 2120/2801 as seen from the bridge side. Image from the AP General Catalogue. Audemars Piguet Archives.
1995. Royal Oak Perpetual Calendar Jubilee 25810OR. Perpetual calendar: day, date, week, month, leap year, phase and age of the moon. Selfwinding, extra-thin Calibre 2120/2801, Movement 438015. Bracelet 944. 39 mm case 68785 in 18-carat pink gold. 120-piece limited edition. Sold in Germany in November 1995. Audemars Piguet Heritge, inv. 1460.
1995. Royal Oak Perpetual Calendar Jubilee 25810OR. Perpetual calendar: day, date, week, month, leap year, phase and age of the moon. Selfwinding, extra-thin Calibre 2120/2801, Movement 438015. Bracelet 944. 39 mm case 68785 in 18-carat pink gold. 120-piece limited edition. Sold in Germany in November 1995. Audemars Piguet Heritge, inv. 1460.
1995. Millenary Perpetual Calendar. Day, date, weeks, months, years, leap year indications. Selfwinding. Calibre 2120/2801. Toupee. Yellow gold. Model 25777. AP Heritage, Inv. 481
1995 - Instruction manual for Calibers 2120/28001- 2802 and 2803. Audemars Piguet Archives.
Mechanism
Selfwinding with 21-carat oscillating weight, variable-inertia balance.
Functions
Hour, minute, perpetual calendar: date, day, month and phase of the Moon, week indication with central hands.
Diameter
28 mm (121/2 lignes)
Thickness
4.30 mm
Frequency
19,800 vph (2.75 Hz)
Power Reserve
Approx. 40 h
Jewels
38
Dates
1995 - circa 2000
Movement Blank
LeCoultre & Cie (movement) and Dubois-Dépraz (casing)
Calibre 2120/2801 is an evolution of Calibre 2120/2800, enhanced by the addition of a week indicator. This feature is displayed via a central hand that points to a scale encircling the dial, numbered 2 to 52.
Introduced in 1995, this calibre remained in production until approximately 2000.
It was used in the Royal Oak ref. 25810, a limited edition of just 120 pieces. However, it is most prominent in the Millenary collection, noteably in reference 25777. Total production is estimated to have been limited to only a few hundred units.
The week indication made its return in 2015 with Calibre 5134, which remained in production until 2025. Its direct successor, Calibre 7138, was unveiled to mark Audemars Piguet's 150th anniversary. This new calibre features a crown that adjusts all indications of the perpetual calendar.
Calibre 2120/2801 is an evolution of Calibre 2120/2800, enhanced by the addition of a week indicator. This feature is displayed via a central hand that points to a scale encircling the dial, numbered 2 to 52.
Introduced in 1995, this calibre remained in production until approximately 2000.
It was used in the Royal Oak ref. 25810, a limited edition of just 120 pieces. However, it is most prominent in the Millenary collection, noteably in reference 25777. Total production is estimated to have been limited to only a few hundred units.
The week indication made its return in 2015 with Calibre 5134, which remained in production until 2025. Its direct successor, Calibre 7138, was unveiled to mark Audemars Piguet's 150th anniversary. This new calibre features a crown that adjusts all indications of the perpetual calendar.
