Defined by its octagonal stainless steel bezel with exposed screws, the Royal Oak 15400ST is one of the most recognizable silhouettes in modern watchmaking. The 41mm stainless steel case houses a black dial finished with a Grande Tapisserie pattern, complemented by applied white gold hour-markers and luminescent hands. A sapphire crystal sits above the dial, while a transparent case back allows a view of the automatic movement within.
Caliber 3120 drives this Royal Oak automatically, offering a date complication displayed at 3 o'clock. The stainless steel bracelet fastens with a fold-over clasp, and the watch carries a water resistance rating of 50 meters. Côtes de Genève decoration and circular graining adorn the movement visible through the sapphire case back.
This example is accompanied by its original Audemars Piguet box and papers — a meaningful addition for collectors and a detail that speaks to the watch's provenance. Reference 15400ST represents the 41mm selfwinding Royal Oak in its most complete form, ready for a new keeper.
