Watch Specification Model: SF743 Movement type: quartz movement Movement model: VH31 Battery model:SR920SW Case material: 316L stainless steel Case back: 316L stainless steel Watch mirror: flat sapphire crystal with AR coating. Water resistance: 200m / 20 ATM Luminous: Swiss BGW9 blue super luminous. Crown: Screwdown Crown Case back: Screwback Case Watch Dimension Case diameter:43mm ( without crown) Case length: 53.65mm (lug to lug) Case thickness: 12.25mm 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, user manual