316L Surgical-Quality Stainless Steel Case Miyota 82SO Automatic Movement Jewel Bearings: 21 Jewels 42 Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Skeleton Dial Observation Caseback to View Movement Logo-Engraved Stainless Steel Crown Genuine Leather Crocodile-Embossed Strap Logo-Engraved Stainless Steel Clasp Luminous Hands 42mm Case Diameter 5ATM Water Resistance