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 Seconds Sub-Dial 42mm Diameter 5 ATM Water Resistance