The Audemars Piguet Royal Oak Selfwinding reference 15550ST.OO.1356ST.08 is a 37mm luxury sports watch featuring a stainless steel case and a distinctive ice blue dial. This model was introduced as part of the collection’s 50th-anniversary redesign, characterized by a slim case profile of 9mm and an integrated stainless steel bracelet with enhanced ergonomics. The ice blue dial is decorated with the signature Grande Tapisserie pattern and features white gold applied hour-markers and Royal Oak hands with luminescent coating. To maintain a clean aesthetic, the traditional AP monogram has been replaced with an embossed gold signature, and the minute track is printed directly onto the Tapisserie surface.
The timepiece is powered by the caliber 5900 automatic movement, which provides a 60-hour power reserve and operates at a frequency of 4Hz. This movement is thinner than its predecessor, allowing for the watch’s svelte profile, and is visible through a sapphire crystal case back. While models produced in 2022 feature a special 50th-anniversary oscillating weight, subsequent production years utilize a standard openworked rotor. The watch offers a water resistance of 50 meters and includes a date complication positioned at 3 o’clock, with a central seconds hand for precise timekeeping.
General reviews of the 15550ST frequently highlight its versatility as a unisex timepiece, noting that the 37mm diameter offers a significant presence on the wrist while remaining more subtle and elegant than the larger 41mm versions. The redesigned bracelet is often praised for its comfort, featuring thinner links and a more pronounced taper. Enthusiasts often remark on the mesmerizing quality of the ice blue dial, which shifts in hue depending on lighting conditions. While highly regarded for its finishing and historical lineage, some collectors note the difficulty of obtaining the watch at retail and the propensity for the high-polish bezel edges to show scratches over time.