Académie Horlogère des Créateurs Indépendants


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Audemars Piguet

Platinum Perpetual Calendar with MOP Dial sold


An extremely rare, almost impossible to find and unquestionably charismatic platinum and mother-of-pearl perpetual calendar wristwatch of the famous Swiss watch brand Audemars Piguet, founded in 1875. Estimated production period: early 2000s. Case in platinum 950, diameter 39mm, 8.25mm thick, sapphire caseback with “Audemars Piguet Swiss Madec” and “Quantième Perpétuel Automatique” inscriptions, case number and watch number in series engraved on rim; signed platinum crown. Light-blue mother-of-pearl ‘new logo’ (Mk2) dial, recessed calendar counters, Royal Oak Perpetual Calendar early stick white gold hour and minute hands, ‘sticks and pearls’ white gold appliques. Caliber 2120/2802, ultra-thin, self-winding, rotor with an inertial segment in 21k yellow gold, 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. Royal Oak platinum 950 bracelet, Audemars Piguet ‘AP’ platinum double folding clasp. 


The Audemars Piguet Royal Oak Perpetual Calendar Ref. 25820PT ‘Platinum and Mother-of-Pearl’ would be an excellent purchase for the collector who desires an utterly rare, almost impossible to find and charismatic platinum and mother-of-pearl perpetual calendar wristwatch from a world-renowned traditional watch brand, one of the undisputed leaders in the haute horlogerie watch market. Ref. 25820 is a classic collector’s item that communicates a certain era in the development of the Royal Oak collection – from 1998 to 2015, when the dials featured a classic leap year indicator, mostly absent in previous references, and before the later number-of-the-week pointer had shown up. Therefore, rare versions and varieties seem to be the most relevant, and deserve the closest attention. 

We are proud to bring to your attention this example, which is one of the rarest Royal Oak Perpetual Calendars ever made. Other execution features, both rare and typical for this reference, undoubtedly increase the attractiveness of the present lot. Its nice double-zero number seems to be the icing on the cake.


CaseOctagonal shaped platinum case 950/1000 with a sapphire caseback, lateral correctors at 2,4,8, & 10 o'clock, crown at 3 o'clock
BraceletIntegrated 950/1000 platinum bracelet, with a folding clasp
DialLight blue, mother of pearl dial with applied white gold indices, leap year and month indication at 12 o'colock, date indication at 3 o'clock, moon phase indication at 6 o'clock, week-day indication at 9 o'clock, white gold obelisk shaped hands
MovementRhodium-plated automatic movement with 21 carat gold rotor, quantième perpetual calendar function
Case No.Nr.100 / E-73367


Case:Good, signs of wear
Bracelet:Good, signs of wear
Dial:Mint condition
Movement:Very good, all functions working properly
Amplitude (Dial on top/Lift angle 52):Approx 270°
Accuracy (Dial on top):Approx +2 sec/day


We offer worldwide delivery on all of our watches.

If ordering from Switzerland or Europe, your watch will be sent the same working week. The courier will depend on the value of the watch, with all watches delivered the next working week.

If ordering from outside Europe, delivery will depend on the choice of courier and destination.

You can cancel your order without giving any reason, within 14 days from the day the watch has been delivered to you.


All of our pre-owned watches have undergone thorough mechanical inspections, including being ultrasonically cleaned, serviced and resealed if appropriate and tested for at least four days, to ensure they meet our highest timekeeping standards.

Our pre-owned and vintage watches, unless stated otherwise, are covered by a full or a limited twenty-four month warranty. For example, due to their age, some vintage watches should not be subjected to the same conditions as when they were new.

All of our new watches are covered by the warranty from the original manufacturer. Please contact us for further information.

Please see our Terms & Conditions for further information.



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