Watch Specification Model: SD1970Movement: Japan NH35 automatic, 41 hours of energy storage. Case material: 316L stainless steelCase back: 316L stainless steelBezel: 120 click unidirect rotational ceramic bezelWatch mirror: sapphire crystal with AR coating.Water resistance: 200 m / 20 ATMLuminous: Swiss C3 green and BGW9 blue super luminous.Crown: Screwdown CrownCase back: Screwback Case V2 clasp: 6 micro adjustment milled clasp.Note: For no logo dial version, it is still V1 3 hole adjustment stamped clasp.Watch Dimension Case diameter: 43.8mm ( without crown)Case length: 46.8mm (lug to lug)Case thickness: 13.5mm 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,Note: If you buy sterile dial version, it is sterile for dial, crown and case caseback