Specification Details Brand Audemars Piguet Collection Royal Oak Selfwinding Chronograph Reference 26240ST.OO.1320ST.06 (Stainless Steel) Movement Type Self‑winding Automatic (Integrated Chronograph) Caliber Audemars Piguet Calibre 4401 — In‑house, column‑wheel & vertical‑clutch chronograph Functions Hours, Minutes, Small Seconds, Date, Flyback Chronograph Power Reserve Approx. 70 hours Jewels 40 jewels Frequency 28,800 vph / 4 Hz Case Material Stainless Steel Case Diameter 41 mm Case Thickness ~12.4 mm (standard for 26240 series) Dial Black “Grande Tapisserie” pattern with white‑gold applied hour markers & Royal Oak hands Crystal Glare‑proofed Sapphire Crystal (Front & Exhibition Back) Caseback Sapphire Exhibition Caseback Bracelet Integrated Stainless Steel Bracelet with AP Folding Clasp Water Resistance 50 m / 5 ATM Style / Gender Luxury Sports Chronograph / Men’s & Unisex Origin Swiss Made
