316L Surgical-Quality Stainless Steel Case Jeweled Automatic Miyota 8N24 Movement Jewel Bearings: 20 Jewels 36-Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Skeleton Dial Observation Caseback to view Movement Logo-Engraved Crown Crown Protector Case Design 316L Surgical-Quality Stainless Steel Bracelet Logo-Engraved Stainless Steel Push-Button Clasp Super Luminova Marker Super Luminova Hands 47mm Diameter 5 ATM Water Resistance