Watch Specification Model:SD1972 Movement: Japan NH36 automatic, 41 hours of energy storage. Case material:316L stainless steel Case back: 316L stainless steel Bezel: 120 click unidirect rotational ceramicbezel Watch mirror: sapphire crystalwith AR coating. Water resistance: 200 m /20 ATM Luminous: Swiss C3 green and BGW9 blue super luminous. Crown: Screwdown Crown Case back:Screwback Case Clasp: V2 6 hole micro adjustment milled clasp Watch Dimension Case diameter: 45mm ( without crown) Case length: 47.7mm (lug to lug) Case thickness: 13.3mm Lug width: 22mm Our service Warranty: 2 years Returns policy: 30-day return and refund, Style: automatic watch, dive watch, luxury watch Package: watch, box,warranty card,