The Audemars Piguet Royal Oak Selfwinding Chronograph 41mm Reference 26240ST 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 180.6g, powered by Audemars Piguet Cal. 4401 Flyback Chronograph beating at 28,800 vph (+0.6 s/d, 298 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. 26240ST | SKU: MC-CUST-26240ST-W137 |
|---|---|
| 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) | 180.6g — 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 • 180.6g 904L Steel Edition • 41.0 mm x 12.4 mm |
| Swiss Super Clone Movement Calibre | Audemars Piguet Cal. 4401 Flyback Chronograph — Swiss Super Clone Mechanical Calibre Regulated to +0.6 s/d, 298 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 Reference 26240ST unites authentic Geneva proportions (41.0 mm x 12.4 mm) with a certified 904L Stainless Steel Custom Architecture mass of 180.6g. 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 Double Balance Wheel Openworked 41mm Chronometer Regulated Spec Ref. 15407ST.OO.1220ST.01 (161.8g) and the Audemars Piguet Royal Oak Selfwinding Chronograph 41mm Ref. 26331ST (180.7g).
This Audemars Piguet Royal Oak Selfwinding Chronograph 41mm Ref. 26240ST weighs 180.6g in 904L Stainless Steel Custom Architecture, matching the exact authentic factory weight on our Monte-Carlo showroom Mettler-Toledo analytical balance.
Yes. All 12 gallery plates show the actual timepiece captured across multiple studio angles on our quality-control bench with zero stock renders.
Reference 26240ST is powered by the Audemars Piguet Cal. 4401 Flyback Chronograph (28,800 vph, 72-hour power reserve, regulated to +0.6 s/d, 298 deg). Message our Monte-Carlo Private Client Concierge on WhatsApp (+1 305 724 0661) for your personalized 4K video dossier.
Monte-Carlo Reference Register • 180.6g 904L Stainless Steel Custom Architecture • Audemars Piguet Cal. 4401 Flyback Chronograph
