Watch Specification Model: steeldive SD1947S Movement: Japan NH35 automatic, 41 hours of energy storage. Case material: Germany Cusn8 Bronze Case back: 316L stainless steel Watch mirror: sapphire crystal with AR coating. Water resistance:1000 m /100 ATM Luminous: Swiss C3 (green) and BGW9-blue super luminous Case back: Screwback Case Watch Dimension Case diameter: 41.5mm(without crown) Case length: 50mm(lug to lug) Case thickness: 15mm Lug width: 24mm 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