316L Surgical-Quality Stainless Steel Case Jeweled Automatic Movement Jewel Bearings: 20 Jewels 36-Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Skeleton Dial Observation Caseback to view Movement Logo-Engraved Crown Genuine Leather Crocodile-Embossed Strap Logo-Engraved Stainless Steel Clasp Luminous Hands 44mm Diameter 5 ATM Water Resistance