Watch Specification Model:SD1979 Movement: Japan NH35 automatic, 41 hours of energy storage. Case material:316L stainless steel Case back: 316L stainless steel Bezel: 120 click unidirect rotational ceramic bezel Watch mirror: sapphire crystalwith AR coating. Water resistance: 200m / 20 ATM Luminous: Swiss C3 green super luminous. Crown: Screwdown Crown Case back:Screwback Case Watch Dimension Case diameter:42.5mm(withoutcrown) Case length: 51mm(lug to lug) Case thickness: 13.2mm Lug width: 22mm Our service Warranty: 3 years Returns policy:Please check the websiteReturn / Exchange / Warranty Policy Style: automatic watch, dive watch, luxury watch Package: watch, box,warranty card, user manual Service: Support retail, wholesale. OEM/ODM.Please contact the seller if necessary.