Watch Specification Model: SD1952S Movement: Japan NH35 automatic, 41 hours of energy storage. Case material: Germany Cusn8 bronze Case back: 316L stainless steel Bezel:120 Click unidirect rotational ceramic/bronze bezel Watch mirror: sapphire crystal with AR coating. Water resistance: 300 m / 30 ATM Luminous: Swiss C3 super luminous, green and orange light. Crown: Screw-Down Case back: Screwback Case buckle: stainless steel Watch Dimension Case diameter: 41mm(without crown) Case length: 52mm(lug to lug) Case thickness: 15mm Lug width: 20mm Our service Warranty: 2 years Returns and Refund: 30 days return & refund service Package: watch, warranty card, user manual, plastic protecting box Style: men’s mechanical watch, men’s automatic watch, dive watch, luxury watch