316L Surgical-Quality Stainless Steel CaseJeweled Chinese Automatic MovementJewel Bearings - 20 Jewels36-Hour Power ReserveBeats per Hour (BPH) - 21600/HourSapphire-Coated Mineral CrystalObservation Caseback to view MovementSemi-Skeleton DialGenuine Leather StrapLogo-Engraved Stainless Steel ClaspLuminous HandsLuminous MarkersSeconds Sub- Dial43mm Case Diameter20 ATM Water Resistance (Professional Deep Diving Approved)