The Audemars Piguet Royal Oak Selfwinding reference 15550ST.OO.1356ST.02 is a 37mm luxury sports watch crafted from stainless steel, released in 2022 to commemorate the 50th anniversary of the Royal Oak collection. This model features a slim case profile of approximately 8.9mm to 9.1mm and an integrated stainless steel bracelet that has been redesigned with thinner, lighter links and a more pronounced taper for enhanced ergonomics. It is distinguished by its “Bleu Nuit, Nuage 50” dial, which features the signature Grande Tapisserie waffle pattern, white gold applied hour markers, and the removal of the traditional “Automatic” inscription for a cleaner aesthetic. The watch is powered by the self-winding Calibre 5900, which offers a 60-hour power reserve and includes a special 22-carat gold oscillating weight with the “50 Years” logo, a detail exclusive to models produced during the anniversary year.
In terms of complications, the timepiece provides essential timekeeping functions including hours, minutes, and central seconds, alongside a date aperture positioned at 3 o’clock. The movement features a hacking seconds mechanism for precise time setting and a quick-set date function. The watch is built with a sapphire crystal and a transparent caseback, allowing a view of the high-end movement finishing. Its water resistance is rated at 50 meters, making it suitable for daily wear but not for swimming or diving.
General reviews of the 15550ST highlight its exceptional versatility and balanced proportions, with many enthusiasts considering the 37mm diameter to be a more traditional and wearable interpretation of the Royal Oak than the larger 41mm models. Critics and owners alike praise the upgraded bracelet for its superior comfort and the refined dial execution, specifically noting the high-quality galvanic growth used for the Audemars Piguet logo. While it is often viewed as a more accessible entry into the brand’s catalog, it is widely regarded as a pinnacle of integrated-bracelet sports watch design. Some minor points of discussion include the lack of a screw-down crown and the fact that the anniversary rotor is limited to the 2022 production cycle, which is expected to enhance its long-term collectibility.