The Audemars Piguet Royal Oak 15400ST.OO.1220ST.01 is an iconic luxury sports watch that embodies the brand's mastery of design and engineering. Featuring a 41mm stainless steel case, this model showcases the signature octagonal bezel with exposed screws, a hallmark of the Royal Oak collection since its introduction in 1972. The "Grand Tapisserie" patterned dial in a rich black tone adds depth and texture, while the applied white gold hour markers and Royal Oak hands with luminescent coating ensure excellent readability. The integrated stainless steel bracelet, with its combination of polished and brushed finishes, enhances the watch's seamless, architectural design.