316L Surgical-Quality Stainless Steel Case Jeweled Miyota 8215 Automatic Movement Jewel Bearings: 21 Jewels Miyota 41 Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Observation Case back to view Movement Uni-Directional Rotating Bezel Rubber Strap Logo-Engraved Stainless Steel Clasp Luminous Hands Date Display 42mm Diameter 10 ATM Water Resistance