316L Surgical-Quality Stainless Steel Case Jeweled Seiko NH38 Automatic Movement Jewel Bearings: 24 Jewels 36-Hour Power Reserve Beats per Hour (BPH): 21600/Hour Sapphire-Coated Mineral Crystal Semi-Skeleton Dial Observation Caseback to View Movement Logo-Engraved Crown Crown Protector Case Design Genuine Leather Crocodile Embossed Strap Luminous Hands Luminous Markers 44mm Case Diameter 5ATM Water Resistance