Watch Specification Brand: Steeldive Model: SD1906 V2 Movement: Japan NH35 automatic movement Case back: 316L stainless steel Case material: 316L stainless steel Watch mirror: sapphire crystal with AR coating. Water resistance: 200 m / 20 ATM Luminous: Swiss C3 green Super Luminous Crown: Screw-Down Case back: Screwback Case Clasp: V2 6-hole adjustable milled clasp Watch Dimension Case diameter: 39mm(without crown) Case length: 49mm(lug to lug) Case thickness: 12.3mm Lug width: 20mm Our service Warranty: 3 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