Movement Automatic Caliber/movement 3175 Base caliber Rolex 3185 Power reserve 48 h Number of jewels 31 Case material Steel Case diameter 40 mm Water resistance 10 ATM Bezel material Steel Crystal Sapphire crystal Dial Black Dial numerals No numerals Bracelet material Steel Bracelet color Steel Clasp Fold clasp Clasp material Steel Functions Date, GMT Documents: Dealer Invoice and guarantee card for 12 month , No original documents Box: No original box Delivery immediately by express courier