Audemars Piguet Royal Oak Quantième Annuel

Few watches have shaped modern collecting quite like the Audemars Piguet Royal Oak. When Gérald Genta unveiled its revolutionary octagonal bezel, exposed white gold screws, and integrated bracelet in 1972, the Royal Oak forever changed the notion of what a luxury sports watch could be. More than five decades later, it remains one of the most influential designs in horological history.

Among the countless Royal Oak references produced over the years, the Quantième Annuel Ref. 25920 occupies a particularly special place. Introduced in the late 1990s, it remains the only Royal Oak ever equipped with an Annual Calendar complication, making it one of the collection's most distinctive and collectible variants. Designed to automatically distinguish between 30- and 31-day months, the Annual Calendar requires correction just once a year at the end of February, offering a remarkable blend of technical sophistication and everyday practicality.

This Reference 25920BA is crafted entirely in 18K yellow gold, with the Royal Oak's iconic 36mm case and integrated bracelet offering proportions that feel both timeless and remarkably contemporary. The warm gold beautifully complements the rich dark blue Grande Tapisserie dial, whose textured surface serves as the backdrop for one of Audemars Piguet's most inventive calendar displays. A centrally mounted red arrow-tipped hand traces the pointer date around the outer chapter ring, while an off-center rotating month register at 6 o'clock introduces an unexpected touch of asymmetry that gives the watch its unmistakable character. Bright white luminous hour markers and hands maintain the Royal Oak's sporting DNA while preserving excellent legibility.

Inside beats an Audemars Piguet's self-winding Caliber 2225/2814, a beautifully finished movement that seamlessly integrates the Annual Calendar complication into one of the manufacture's most celebrated collections. The combination of elegant engineering and intuitive usability makes the Reference 25920 one of the most practical and complicated Royal Oaks ever produced.

Rare, technically fascinating, and unlike any other Royal Oak ever made, the Ref. 25920BA represents a remarkable chapter in Audemars Piguet's history. For collectors seeking something beyond the familiar perpetual calendars and chronographs, it offers the perfect intersection of Gérald Genta's iconic design, precious-metal craftsmanship, and one of modern watchmaking's most ingenious complications.

There are certain watches that define a brand, informing its design ethos and becoming nothing short of iconic in the minds of collectors. For Audemars Piguet, that watch is the Royal Oak, in all its multitudinous incarnations. Yet the manufacture from Le Brassus did not earn its seat in the triumvirate of leading watch brands — the so-called Big Three — on the success of the Royal Oak alone.

In fact, both Jules Audemars and Edward Piguet came from long lines of watchmakers, and made their reputations long before the Royal Oak was conceived. Their reputations rested on their ability to create incredibly elegant timepieces in numerous styles. While some of these timepieces were simple, elegant dress watches, others were one-off or short-series pieces produced at the rate of a handful per year. (Some years, Audemars Piguet only produced a few hundred watches in total.) Calendar watches, chronographs, minute repeaters — all the delights of haute horlogerie were part and parcel of the AP oeuvre long before the Royal Oak made its debut in 1972.

Technical innovations from AP abound and include the first minute-repeating movement, the first skeleton watch and an ultra-thin automatic tourbillon. Newer collections, such as the Code 11.59 from 2019, see the maison continue to develop new and exciting watches and calibers, the likes of which aren’t based upon tired horological tropes from models past. (Though if vintage reissues are your bag, AP does have a special “Remaster” line — currently consisting of just one model — that reimagines some of its classical, complicated pieces from the mid-20th century.)

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Condition

Since our pieces are vintage or pre-owned, please expect wear & patina from usage and age. Please read each item description and examine all product images.

Warranty

We back each Analog:Shift vintage timepiece with a two-year mechanical warranty from the date of purchase.

International Buyers

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We welcome international buyers, please contact us prior to purchase for additional details on shipping and payment options.