316L Surgical-Quality Stainless Steel Case Custom Patterned Case Design Jeweled 2560 Automatic Movement Jewel Bearings: 22 Jewels 41 Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Observation Case back to view Movement Genuine Leather Strap Logo-Engraved Stainless Steel Clasp Luminous Hands Magnified Date Display 40mm Diameter 10 ATM Water Resistance