Here are the key specifications for the Audemars Piguet Royal Oak Selfwinding Chronograph 18-carat Pink Gold Specification Details Brand Audemars Piguet Collection Royal Oak Selfwinding Chronograph “50th Anniversary” Reference 26240OR.OO.D315CR.02 Case Material 18-carat pink gold Case Diameter 41 mm Case Thickness ~12.4 mm (typical for 26240 chronographs) Dial Color & Pattern “Bleu Nuit, Nuage 50” Grande Tapisserie with matching chronograph counters Crystal Glare-proofed sapphire crystal Caseback Sapphire exhibition caseback Movement Type Self-winding automatic Caliber Audemars Piguet Caliber 4401 (integrated chronograph, column wheel & vertical clutch) Functions Hours, Minutes, Small Seconds, Date, Flyback Chronograph (central seconds, 30-min & 12-hr counters) Power Reserve ~70 hours Jewels 40 Frequency 28,800 vph / 4 Hz Strap Blue alligator leather strap with 18-carat pink gold AP folding clasp Water Resistance 50 m / 5 ATM Style / Gender Luxury Sports Chronograph / Men’s & Unisex Origin Swiss Made
