The Audemars Piguet Royal Oak Selfwinding reference 15550ST.OO.1356ST.03 is a 37mm luxury sports watch released in 2022 to commemorate the 50th anniversary of the Royal Oak collection. This model features a stainless steel case with a thickness of 9mm and a sapphire crystal exhibition caseback that reveals the movement. The grey “Grande Tapisserie” dial is detailed with white gold applied hour-markers and luminescent Royal Oak hands, providing a refined aesthetic that maintains the collection’s iconic octagonal silhouette and integrated bracelet design.
Powering the timepiece is the self-winding Calibre 5900, which offers hours, minutes, center seconds, and date functions. This movement operates at a frequency of 4Hz and provides a 60-hour power reserve. A notable feature of this specific production year is the 22k pink gold rhodium-plated oscillating weight featuring the “50 Years” logo, a detail reserved exclusively for models manufactured during the anniversary year. The watch is water-resistant to 50 meters and is fitted with a stainless steel bracelet featuring an AP folding clasp.
General reviews of the 15550ST highlight the improved ergonomics of the redesigned bracelet, which is thinner and features a more pronounced taper than previous iterations. Critics and enthusiasts often praise the 37mm diameter as a versatile unisex size that offers substantial wrist presence due to the case shape while remaining slim enough for formal wear. The transition to the Calibre 5900 is noted for allowing a thinner case profile compared to its predecessors. While the watch is highly regarded for its finishing and historical significance, some collectors note that the 50th-anniversary rotor serves as the primary differentiator from subsequent standard production models.