Watch Specification Model:SF790 Movement: Japan NH34 GMT movement Case material:316L stainless steel Case back: 316L stainless steel Watch mirror: flat sapphire crystalwith AR coating. Water resistance: 200m / 20 ATM Crown: Screwdown Crown Case back:Screwback Case Clap: V2 6-hole adjustable milled clasp Watch Dimension Case diameter:39mm(withoutcrown) Case length: 48.8mm(lug to lug) Case thickness: 12.35mm Lug width: 20mm Our service Warranty:2 years Returns policy:30-day return and refund. Style: automatic watch, dive watch, luxury watch Package: watch, box,warranty card, user manual