Watch Specification Model: SD1950S Movement: Japan NH35 automatic, 41 hours of energy storage. Case material: Germany Cusn8 bronze Case back: 316L stainless steel Bezel:120 Clickunidirect rotationalceramic bezel Watch mirror: sapphire crystalwith AR coating. Water resistance: 3000 m / 300 ATM Luminous: Swiss C3 green and BGW9 bluesuper luminous Crown: Screw-Down and two crown design Case back: Screwback Case Exhast Valve: Yes Watch Dimension Case diameter: 44mm(without crown) Case length: 51.5mm(lug to lug) Case thickness: 19.45mm Lug width: 22mm Our service Warranty: 2years Returns and Refund: 30 days return & refund service Package: watch,warranty card, user manual, plastic protecting box