316L Surgical-Quality Stainless Steel Case Jeweled Automatic Movement Jewel Bearings: 22 Jewels 41 Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Semi-Skeleton Dial Observation Caseback to view Movement 316L Surgical-Quality Stainless Steel Bracelet Logo-Engraved Stainless Steel Clasp Luminous Hands Luminous Markers Day Sub-Dial Date Sub-Dial Month Display Year Display 42mm Diameter 10 ATM Water Resistance