lot 13

Audemars Piguet

Royal Oak Perpetual Calendar

Estimate CHF 80 000 / CHF 90 000
Starting bid CHF 80 000

Hammer price CHF 130 000
Total bids 12
Buyer’s premium will not be charged


CaseOctagonal rose gold case 750/1000 with a sapphire caseback
StrapDark brown alligator strap, with original 750/1000 folding clasp
DialDark brown Tapisserie dial, with applied rose gold luminous indices, month & leap year indication at 12 o'clock, date indication 3 o'clock, moonphase indication 6 o'clock, weekday indication 9 o'clock
MovementFlat rhodium-plated automatic movement, with Geneva stripes, engraved & skelotonized rotor, perpetual calendar
Movement No.550960
Case No.G45161 / No.0247

Condition report

Case:Good, small sign of wear
Strap:Good, small signs of wear
Dial:Mint condition
Movement:All functions working properly
Amplitude (Dial on top/Lift angle 52):Approx 290 degrees
Accuracy (Dial on top):Approx + 5 sec/day
Exctract from archives:Yes


An extremely rare, desirable and charismatic chocolate-brown dial rose gold perpetual calendar wristwatch of the famous Swiss watch brand Audemars Piguet, founded in 1875. Estimated production period: circa 2008 – 2014, purchase date: 2009. Case in 18k rose gold, diameter 39mm, thickness 9.3mm, chocolate-brown dial with enlarged ‘Grande Tapisserie’ pattern, sunken sub-dials, rose gold and luminous rounded baton Gérald Genta original hands and indexes. Self-winding caliber 2120/2802, skeletonized rotor with an ‘AP’ monogram and an inertial segment in 21k yellow gold, ultra-thin, power reserve of up to 40 hours. Functions – indication of time in hours and minutes, perpetual calendar with indicators of date at 3 o’clock, day of the week at 9 o’clock, month and leap year at 12 o’clock, and moon phase at 6 o’clock. Dark brown leather strap, Audemars Piguet ‘AP’ double folding clasp.

Lot essay

The present reference, which was reportedly produced from circa 2008 to 2014, appears very rarely at auctions. So rare that we tend to consider it vanishingly rare, and it might not even make it into the Audemars Piguet perpetual calendar reviews. The watch was produced in two versions – the present reference with a chocolate-brown dial, and Ref. 26252OR.OO.D092CR.02 with a matt silvered dial, both in rose gold. Although these reference examples on a bracelet occasionally appear on the market, there is reason to believe that the launch of Ref. 26252OR was undertaken by Audemars Piguet as an alternative to the standard reference 25820 offered exclusively on a bracelet. A study of Audemars Piguet’s perpetual calendar offer on the market provides a simple answer as to why the brand undertook to issue a reference on a leather strap – there are no other Royal Oak perpetual calendar references fitted with a strap. All this leads us to believe the appearance of the present lot at this sale is a rare and lucky chance to acquire a perpetual calendar of one of the rarest references.

It's a unique chance to purchase an extremely rare, desirable and charismatic chocolate-brown dial and leather strap perpetual calendar reference example

The present example is powered by the caliber 2120/2802, an upgraded version of the ultra-thin self-winding caliber 2120/2800, which received a previously-missing leap year indicator. The small thickness of the movement made it possible to produce remarkably thin and elegant watches, which is especially significant given the complexity of the function of the perpetual calendar itself. With a thickness of 3.95mm, it remained the thinnest perpetual calendar movement with a central rotor of an automatic winding system until 2018. The basic automatic movement is based on a movement-blank supplied by Jaeger-LeCoultre, while the calendar module is based on a kit from the Dubois Dépraz factory. Both are long-term partners and suppliers of Audemars Piguet. The production of caliber 2120/2802 was discontinued in 2014–2015 due to the launch of the new caliber 5134, which received an additional indicator of the week number of the year.

Reasons to bid

The Royal Oak Perpetual Calendar Ref. 26252OR.OO.D092CR.01 is a unique chance for the discerning collector to purchase an extremely rare, desirable and charismatic chocolate-brown dial and leather strap perpetual calendar reference example from a world-famous traditional watch brand, one of the undisputed leaders in the haute horlogerie watch market. The leather-strap Ref. 26252OR is definitely among the rarest and most collectible versions of the Royal Oak Perpetual Calendar. The charismatic chocolate-brown dial with the harmoniously matched rose-gold hands and indexes of the original Gérald Genta Royal Oak design highlights the rare strap execution.