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The Audemars Piguet Royal Oak is one of the most iconic luxury sports watches ever created, defined by its octagonal bezel with exposed screws and integrated bracelet. Ref. 15400ST features a silver “Grande Tapisserie” dial and clean automatic layout, representing a modern evolution of the original Royal Oak design.
General Specifications
- Reference: 15400ST.OO.1220ST.02
- Collection: Royal Oak Selfwinding
- Case Size: 41 mm
Case
- Material: High-quality plated metal.
- Construction: Solid case with screw-secured case back
- Bezel: Octagonal bezel with visible hexagonal screws
- Crown: Screw-down crown
- Crystal: Scratch-resistant sapphire
Movement
- Type: Self-winding automatic
- Calibre: Audemars Piguet Calibre 3120
- Power Reserve: Approximately 60 hours
- Frequency: 21,600 vph
- Technology: 22k gold rotor, in-house movement architecture
Functions
- Hours, minutes, seconds
- Date display at 3 o’clock
- Stop-seconds for precise time setting
Dial
- Color: Silver
- Finish: “Grande Tapisserie” textured pattern
- Hour Markers: Applied index markers (white gold style)
- Feature: Signature grid pattern with refined light reflection
Bracelet
- Type: Integrated Royal Oak bracelet
- Clasp: Folding AP clasp
Technical Notes
- Royal Oak design introduced in 1972, defining luxury sports watch category
- Integrated bracelet and case create a seamless profile
- Calibre 3120 is widely respected for durability and finishing
- Basic, suitable for wearing while showering or in light rain. Not recommended for swimming or diving.