Audemars Piguet
Royal Oak | 25920BA | yellow gold

Quantième Annuel

Regular price


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Audemars Piguet
Royal Oak | 25920BA | yellow gold

Quantième Annuel

Regular price


This Audemars Piguet Royal Oak Quantième Annuel 25920BA is an unusual combination of the iconic Royal Oak design and a seldom seen complication. Believed to have been produced for only a handful of years, the Quantième Annuel 25920 remains the one and only annual calendar reference in the brand’s history. The fact it’s housed within a yellow gold Royal Oak case makes it all the more compelling.

An innovative complication

In 1996, Patek Philippe released the world’s first annual calendar wristwatch. It was developed to show relevant information about the day, whilst also providing a more accessible price point for such a complication when compared with the brand’s perpetual calendars. An annual calendar only requires adjustment once a year in February, as it accounts for the long and short months throughout the year.

Not far behind, Audemars Piguet saw the potential of such a useful complication and started developing their own annual calendar movement. It is understood that the Quantième Annuel 25920 was briefly produced from 1999 to the early 2000s, remaining the only annual calendar Audemars Piguet ever made. This particular example, sold in 2006, bears an individual number below 150, which gives us a broad sense of how few pieces were produced. The brand made the choice to house the newly designed complication within their mid-size Royal Oak design, which was popular with customers at the time. Produced in stainless steel and yellow gold, the reference is seldom ever seen in the latter metal, with examples housing a white dial being all the more unusual.

An all-gold design

An all-gold Royal Oak is a bit of a paradox. The Royal Oak was originally conceived as a luxury steel watch, yet its design and proportions render wonderfully when executed in yellow gold. More unusual than its steel counterpart, this Quantième Annuel 25920BA elegantly combines the practical complication with angular yellow gold case. Usually more susceptible to wear than its stainless steel equivalent, this 25920BA is well-preserved, retaining its original lines, crisp hallmarks and a thick case. 

At 36mm in diameter, and only 8mm thick, this Royal Oak case is a beautiful twist of perspectives and size. It comes with its original bracelet and deployant clasp, featuring the hallmark of famed bracelet maker Gay Frères, who produced the first Oyster bracelets for Rolex, as well as integrated bracelets for the original Nautilus and Royal Oak

Thanks to the slim profile of the case and bracelet, the ref. 25920BA hugs the wrist, in a way which may surprise the wearer, considering the complication it houses. Collectors have noticed that on account of the unique case shape of the Royal Oak, the mid-size version of the watch wears much larger on the wrist than its dimensions would suggest.

The multi-levelled dial features a radial date and an off-center month sub-dial. The contrast between the tapisserie pattern in the center and the brushed outer section lends a satisfying contrast to the dial, especially when it catches the light at certain angles. Usually found with a blue dial, on a small handful of examples have appeared publicly with a white dial. The lighter colour complements the softness of the yellow gold case, bringing visual coherence to the overall design.

The movement 

This Audemars Piguet Royal Oak Quantième Annuel 25920BA is powered by the ultra-thin AP caliber 2225/2814, derived from Jaeger-LeCoultre’s JLC 889 calibre movement. The first and only annual calendar movement developed by Audemars Piguet, the 35-jewel movement is rhodium-plated, with fausses côtes embellishment. It includes a self-compensating flat balance-spring, and a 21K gold rotor segment.

The set

This Audemars Piguet Royal Oak Quantième Annuel 25920BA comes with its outer box, inner box, pusher, original hangtag, instruction manual and certificate of origin. This particular example was sold at the Hour Glass in Singapore in July 2006. 

Viewings can be arranged in Central London by appointment only.

Brand: Audemars Piguet
Model: Quantième Annuel 25920BA
Movement: mechanical automatic AP Caliber 2225/2814
Functions: annual calendar, date, hours, minutes
Features: white dial
Case: 36 mm yellow gold
Crystal: sapphire front
Bracelet: yellow gold AP-stamped bracelet and clasp
Year: 2006 (sold)
Box & papers: outer box, inner box, pusher, original hangtag, instruction manual and certificate of origin
This Audemars Piguet Royal Oak Quantième Annuel 25920BA is in very good condition and has perfect mechanical functionality. The case and bracelet are excellently finished, with angular, bevelled, polished and granular surfaces, with virtually no imperfections. Both the case and bracelet are original to the watch, with appropriately corresponding signatures on the reverse. The original bracelet has virtually no stretch and has 21 links, including 9 removable ones. The white dial is very well-preserved. The 2225 calibre movement of this 25920BA comes with a two-year warranty from A Collected Man.

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. Please see our Terms & Conditions for further information. 

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

We offer worldwide delivery on all of our watches.

If ordering from the UK or Europe before 1 PM, your watch will be sent the same working day. The courier will depend on the value of the watch, with all watches delivered the next working day.

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

Please note, that prices are quoted gross of VAT (unless expressly stated otherwise) and that preowned goods (in the United Kingdom) are subject to a marginal rate of VAT, which can not be reclaimed. For further information, please see here.

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

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