The Audemars Piguet Royal Oak Selfwinding (Ref. 15400ST.OO.1220ST.01) is a timeless men's/unisex watch featuring a perfectly proportioned 41mm stainless steel case and bracelet. Accompanied by its original box and papers, this model is powered by the automatic caliber 3120 movement, boasting a 60-hour power reserve and containing 40 jewels for reliable and precise timekeeping. The watch's signature octagonal bezel.