Features/Specifications: 316L Surgical-Quality Stainless Steel CaseJeweled Automatic MovementJewel Bearings: 17 Jewels36-Hour Power ReserveBeats per Hour (BPH): 21600/HourAverage Gain/Loss Rate: +/- 45 Seconds per DaySapphire-Coated Mineral CrystalMother of Pearl Dial11 Crystal Markers on DialObservation Caseback to View MovementCrystal Set BezelGenuine Leather Crocodile-Embossed StrapLogo-Engraved Stainless Steel ClaspLuminous Hands35mm Case Diameter5ATM Water Resistance