The Audemars Piguet Royal Oak Perpetual Calendar reference 26574PT.OO.1220PT.01 is a highly exclusive 41mm luxury timepiece crafted entirely from 950 platinum. Released as a limited edition of only 50 pieces, this model features the collection’s signature octagonal bezel and integrated bracelet, both meticulously finished with alternating satin-brushed and polished surfaces. The watch is distinguished by its vibrant ice blue dial with a Grande Tapisserie pattern, accented by navy blue sub-dial rings and white gold applied hour-markers. It is powered by the ultra-thin, in-house caliber 5134 automatic movement, which contains 374 parts, operates at 19,800 vph, and offers a 40-hour power reserve.
The timepiece’s complications include a full perpetual calendar that indicates the day, date, month, and leap year, alongside a week indicator on the outer rim and an astronomical moon phase set on an aventurine disc. This moon phase is precisely engineered to require adjustment only once every 125 years and 317 days. Despite its intricate movement, the case maintains a slim profile of 9.5mm and includes a screw-down crown, although its water resistance is limited to 20 meters.
General reviews emphasize the watch’s exceptional wrist presence, attributed to the substantial weight and density of its platinum construction. Collectors frequently praise the legibility of the redesigned 41mm layout and the striking aesthetic of the ice blue dial, which is often cited as one of the most visually appealing variations in the Royal Oak Perpetual Calendar lineage. While the high cost of maintenance and limited water resistance are noted as practical drawbacks, the reference is widely regarded as a pinnacle “grail” watch due to its rare material composition, technical sophistication, and extremely limited production.