Watch SpecificationModel: SD1953Movement: Japan NH35 automatic, 41 hours of energy storage.  Case material: 316L stainless steelCase back: 316L stainless steelBracelet: 316L stainless steelBezel: 120 Click unidirect rotational ceramic bezel  Watch mirror: sapphire crystal with AR coating. Water resistance: 300 m / 30 ATMLuminous: Swiss BGW9 super luminous, blue night light.Crown: Screw-DownCase back: Screwback Case★V2 clasp: 6 micro adjustment milled claspWatch Dimension Case diameter: 40.5mm(without crown)Case length: 47.7mm(lug to lug)Case thickness: 13.3mm Lug width: 20mmOur serviceWarranty: 2 years Returns and Refund: 30 days return & refund serviceStyle: men’s mechanical watch, men’s automatic watch, dive watch, luxury watch