Recorded in our Monte-Carlo solid 18K gold Audemars Piguet register, the Audemars Piguet Royal Oak Selfwinding 37mm Chronometer Regulated Spec Reference 15450ST unites authentic Geneva proportions (37.0 mm x 9.8 mm) with a certified 904L Stainless Steel Custom Architecture mass of 132.1g. Every detail of the Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands, Octagonal Brushed & Chamfered Bezel Locked by 8 White Gold Hexagonal Screws with Anti-Reflective Scratch-Resistant Sapphire Crystal, and hallmarked clasp is verified under our Fischer XRF Au750 and Mettler-Toledo laboratory protocol.

5 Core Horological & Metallurgical Specifications:

• Registered Entity & Ref: Audemars Piguet Royal Oak Selfwinding 37mm Chronometer Regulated Spec — Official Reference 15450ST (SKU: MC-CUST-15450ST-W488).
• Precious Metal Alloy: 904L Stainless Steel Custom Architecture with deep mechanical hallmarking and 5-axis Swiss CNC case finishing.
• Verified Reference Mass: 132.1g confirmed on our Monte-Carlo showroom Mettler-Toledo analytical balance.
• Mechanical Calibre: Audemars Piguet Cal. 3120 / Cal. 5900 operating at 28,800 vph (4 Hz) with 72-hour power reserve (+0.7 s/d, 298 deg).
• Sapphire Crystal & QC: Scratch-resistant sapphire crystal with double anti-reflective coating and 50m / 5 ATM water resistance.

Within the same Audemars Piguet horological silo, collectors also compare the Audemars Piguet Royal Oak Jumbo Extra-Thin 39mm Hand-Chamfered Bevel Spec Ref. 15202ST (103.7g) and the Audemars Piguet Royal Oak Selfwinding Chronograph 38mm Sunburst Rhodium / Slate Grey Dial Ref. 26315ST.OO.1256ST.02 (146.1g).