Audemars Piguet Royal Oak 15400ST.OO.1220ST.01 — Stainless Steel Selfwinding Specification Details Brand Audemars Piguet Collection Royal Oak Selfwinding Reference 15400ST.OO.1220ST.01 (associated with 1220ST.01) Movement Automatic (AP Calibre 3120) Functions Hours, Minutes, Seconds, Date Power Reserve ~60 hours Jewels 40 jewels Frequency 21,600 vph / 3 Hz Case Material Stainless Steel Case Diameter 41 mm Case Thickness ~9.8 mm Dial Black “Grande Tapisserie” pattern with white‑gold markers (turn0search5) Crystal Sapphire crystal Caseback Transparent sapphire exhibition back (turn0search6) Bracelet Stainless steel integrated Royal Oak bracelet Clasp AP folding clasp Water Resistance 50 m / 5 ATM (turn0search6) Style / Gender Luxury sports watch / Men’s & Unisex Origin Swiss Made
