The Audemars Piguet Royal Oak Selfwinding reference 15510ST.OO.1320ST.06 is a 41mm luxury sports watch featuring a stainless steel case with a thickness of 10.5mm. It is characterized by the collection’s signature octagonal bezel secured by eight hexagonal white gold screws and an integrated stainless steel bracelet with a folding AP clasp. The timepiece is equipped with a “Bleu Nuit, Nuage 50” dial featuring the “Grande Tapisserie” pattern, white gold applied hour-markers, and Royal Oak hands with luminescent coating. It is powered by the in-house caliber 4302 automatic movement, which contains 257 parts and provides a power reserve of approximately 70 hours.
In terms of complications, this model provides essential timekeeping functions including hours, minutes, and center seconds, along with a date window located at the 3 o’clock position. The watch features a screw-locked crown and a glareproofed sapphire crystal and caseback, ensuring water resistance up to 50 meters. The movement operates at a frequency of 4 Hz and includes a dedicated 22-carat pink gold oscillating weight, visible through the transparent caseback.
General reviews of the 15510ST highlight its refined ergonomics, noting that the case features wider polished chamfers and a more pronounced taper on the integrated bracelet compared to its predecessor, the 15500. The “Bleu Nuit, Nuage 50” dial is frequently praised for its historical connection to the original 1972 model and its dynamic aesthetic. While the watch is lauded for its exceptional finishing and iconic design, some critics mention that the 41mm size makes it one of the more commanding presences in the Royal Oak lineup, and others have noted that the luminescent performance could be more robust for nighttime legibility.