316L Surgical-Quality Stainless Steel Case Jeweled Miyota 8N24 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 Strap Logo-Engraved Stainless Steel Clasp Super-Luminova Luminous Hands Luminous Markers 37mm Case Width 170-220mm Wrist Size 3 ATM Water Resistance