The Audemars Piguet Royal Oak Selfwinding Chronograph 41mm Geneva Atelier Spec Reference 26331ST is a Monte-Carlo registered luxury timepiece crafted in 904L Stainless Steel Custom Architecture (41.0 mm x 12.4 mm) with a verified Mettler-Toledo analytical weight of 180.4g, powered by Audemars Piguet Cal. 2385 Column-Wheel Chronograph beating at 28,800 vph (+0.4 s/d, 296 deg) with a 72-hour power reserve, double anti-reflective sapphire crystal, and 50m / 5 ATM water resistance.
| Entity, Maison & Official Reference | Audemars Piguet — Royal Oak Selfwinding Chronograph 41mm | Ref. 26331ST | SKU: MC-CUST-26331ST-W450 |
|---|---|
| Precious Metal Alloy & XRF Purity | 904L Stainless Steel Custom Architecture — 5-Axis Swiss CNC Precision Architecture • 1:1 Authentic Reference Mass • Bespoke Collector Commission |
| Verified Total Mass (Mettler-Toledo Scale) | 180.4g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| Bezel Architecture & Gem-Setting Spec | Octagonal Brushed & Chamfered Bezel Locked by 8 White Gold Hexagonal Screws with Anti-Reflective Scratch-Resistant Sapphire Crystal • 180.4g 904L Steel Edition • 41.0 mm x 12.4 mm |
| Swiss Super Clone Movement Calibre | Audemars Piguet Cal. 2385 Column-Wheel Chronograph — Swiss Super Clone Mechanical Calibre Regulated to +0.4 s/d, 296 deg |
| Power Reserve & Oscillation Frequency | 72-Hour Power Reserve • 28,800 vph (4 Hz) Free-Sprung Balance Wheel |
| Double AR Sapphire Crystal & Water Resistance | Scratch-Resistant Sapphire Crystal with Double Anti-Reflective Coating • 50m / 5 ATM |
| Dial Finishing & Hallmarked Bracelet Clasp | 41.0 mm x 12.4 mm • Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands • Hand-Brushed & Chamfered Integrated Solid Link Bracelet & Deployant Clasp |
Recorded in our Monte-Carlo solid 18K gold Audemars Piguet register, the Audemars Piguet Royal Oak Selfwinding Chronograph 41mm Geneva Atelier Spec Reference 26331ST unites authentic Geneva proportions (41.0 mm x 12.4 mm) with a certified 904L Stainless Steel Custom Architecture mass of 180.4g. 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.
Within the same Audemars Piguet horological silo, collectors also compare the Audemars Piguet Royal Oak Jumbo Extra-Thin 39mm Custom Tapestry Dial 22K Gold Rotor Ref. 15202ST (103.2g) and the Audemars Piguet Royal Oak Selfwinding Chronograph 41mm Custom Tapestry Dial 22K Gold Rotor Ref. 26240ST (180.3g).
This Audemars Piguet Royal Oak Selfwinding Chronograph 41mm Geneva Atelier Spec Ref. 26331ST weighs 180.4g in 904L Stainless Steel Custom Architecture, matching the exact authentic factory weight on our Monte-Carlo showroom Mettler-Toledo analytical balance.
Yes. All 7 gallery plates show the actual timepiece captured across multiple studio angles on our quality-control bench with zero stock renders.
Reference 26331ST is powered by the Audemars Piguet Cal. 2385 Column-Wheel Chronograph (28,800 vph, 72-hour power reserve, regulated to +0.4 s/d, 296 deg). Message our Monte-Carlo Private Client Concierge on WhatsApp (+1 305 724 0661) for your personalized 4K video dossier.
Monte-Carlo Reference Register • 180.4g 904L Stainless Steel Custom Architecture • Audemars Piguet Cal. 2385 Column-Wheel Chronograph
