The Audemars Piguet Royal Oak reference 15400ST.OO.1220ST.03 is a luxury sports watch featuring a 41mm stainless steel case and a signature octagonal bezel secured by eight hexagonal screws. It is characterized by its boutique-only blue dial with the Grande Tapisserie pattern, which includes white gold applied hour markers and hands with luminescent coating. The timepiece is approximately 9.8mm thick and is equipped with a glareproofed sapphire crystal and exhibition caseback. An integrated stainless steel bracelet with a folding clasp completes the design, while the screw-locked crown ensures water resistance up to 50 meters.
In terms of complications, the watch offers hours, minutes, central seconds, and a date window located at the 3 o’clock position. It is powered by the in-house self-winding Caliber 3120, a movement consisting of 280 parts and 40 jewels. This mechanical movement features a bidirectional 22-carat gold rotor engraved with the brand’s coat of arms, ceramic ball bearings, and a hacking seconds function for precise time setting. It operates at a frequency of 3Hz and provides a power reserve of approximately 60 hours.
General reviews of the 15400ST highlight its iconic design and exceptional hand-finished bracelet, which many collectors consider one of the most comfortable in the industry. The 41mm case size is often cited as a modern evolution that maintains the watch’s classic proportions while offering a more substantial wrist presence than its 39mm predecessors. While the watch is praised for its aesthetic versatility and the depth of its blue dial, some users have noted that the high-polish and satin-brushed surfaces can be prone to scratches. Additionally, critics occasionally mention that the movement was originally designed for smaller cases, resulting in a date window positioned closer to the center of the dial.