Watch Specification Model:SD1952 Movement: Japan NH35 automatic, 41 hours of energy storage. Case material:316L stainless steel Case back: 316L stainless steel Bezel:120 Clickunidirect rotationalceramic bezel Watch mirror: sapphire crystalwith AR coating. Water resistance: 300 m / 30 ATM Luminous: Swiss C3super luminous, Green light Crown: Screw-Down Case back:Screwback Case Buckle: Upgraded 6 micro adjustment milled clasp Watch Dimension Case diameter:41mm(without crown) Case length: 52mm(lug to lug) Case thickness: 15mm Band Lug width: 20mm Bracelet buckle width: 18mm Our service Warranty: 2years Returns and Refund: 30 days return & refund service Package: watch,warranty card, user manual, plastic protecting box Style: mens mechanical watch, mens automatic watch, dive watch, luxury watch