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 316L Surgical-Quality Stainless Steel Bracelet Logo-Engraved Fold-over Push-Button Deployment Clasp Luminous Hands 45mm Diameter 5ATM Water Resistance