- 316L Surgical-Quality Stainless Steel Case - Jeweled Automatic Movement - Jewel Bearings: 20 Jewels - 42-Hour Power Reserve - Beats per Hour (BPH): 21600/Hour - Sapphire-Coated Mineral Crystal - Skeleton Dial - Observation Caseback to View Movement - Crown Protector Case Design - Genuine Leather Crocodile-Embossed Strap - Logo-Engraved Stainless Steel Clasp - Luminous Hands - Luminous Markers - 41mm Diameter - 5 ATM Water Resistance