The Audemars Piguet Royal Oak Offshore Selfwinding Chronograph 43mm Reference 26420IO.OO.A009CA.01 is a Monte-Carlo registered luxury timepiece crafted in 904L Stainless Steel Custom Architecture (43.0 mm x 14.4 mm) with a verified Mettler-Toledo analytical weight of 131.6g, powered by Audemars Piguet Cal. 4401 Flyback Chronograph beating at 28,800 vph (+0.4 s/d, 304 deg) with a 72-hour power reserve, double anti-reflective sapphire crystal, and 100m / 10 ATM water resistance.
| Entity, Maison & Official Reference | Audemars Piguet — Royal Oak Offshore Selfwinding Chronograph 43mm | Ref. 26420IO.OO.A009CA.01 | SKU: MC-CUST-26420IO.OO.A009CA.01-W530 |
|---|---|
| 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) | 131.6g — 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 • 131.6g 904L Steel Edition • 43.0 mm x 14.4 mm |
| Swiss Super Clone Movement Calibre | Audemars Piguet Cal. 4401 Flyback Chronograph — Swiss Super Clone Mechanical Calibre Regulated to +0.4 s/d, 304 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 • 100m / 10 ATM |
| Dial Finishing & Hallmarked Bracelet Clasp | 43.0 mm x 14.4 mm • Hand-Finished Sunray Collector Dial with Hand-Finished Luminous Appliques & Hands • Integrated Vulcanized Rubber Strap with Precision Audemars Piguet Folding Clasp |
Recorded in our Monte-Carlo solid 18K gold Audemars Piguet register, the Audemars Piguet Royal Oak Offshore Selfwinding Chronograph 43mm Reference 26420IO.OO.A009CA.01 unites authentic Geneva proportions (43.0 mm x 14.4 mm) with a certified 904L Stainless Steel Custom Architecture mass of 131.6g. 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 5-Axis CNC Case Ref. 15407ST.OO.1220ST.01 (162.0g) and the Audemars Piguet Royal Oak Selfwinding 37mm Hand-Chamfered Bevel Spec Ref. 15450ST (132.7g).
This Audemars Piguet Royal Oak Offshore Selfwinding Chronograph 43mm Ref. 26420IO.OO.A009CA.01 weighs 131.6g in 904L Stainless Steel Custom Architecture, matching the exact authentic factory weight on our Monte-Carlo showroom Mettler-Toledo analytical balance.
Yes. All 9 gallery plates show the actual timepiece captured across multiple studio angles on our quality-control bench with zero stock renders.
Reference 26420IO.OO.A009CA.01 is powered by the Audemars Piguet Cal. 4401 Flyback Chronograph (28,800 vph, 72-hour power reserve, regulated to +0.4 s/d, 304 deg). Message our Monte-Carlo Private Client Concierge on WhatsApp (+1 305 724 0661) for your personalized 4K video dossier.
Monte-Carlo Reference Register • 131.6g 904L Stainless Steel Custom Architecture • Audemars Piguet Cal. 4401 Flyback Chronograph
