316L Surgical-Quality Stainless Steel Case Jeweled Automatic Movement Jewel Bearings: 22 Jewels 42-Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Skeleton Dial Observation Caseback to View Movement Genuine Leather Crocodile-Embossed Strap Logo-Engraved Stainless Steel Clasp Luminous Hands 45mm Diameter 5ATM Water Resistance