Features: Stainless Steel Case Nylon Strap Automatic Movement Caliber: Seiko NH35 Sapphire Crystal Helium Valve Blue Dial Analog Display Luminous Hands And Markers Date Display Rotating Bezel Screw Down Crown Engraved Caseback Buckle Clasp 1000M Water Resistance Approximate Case Diameter: 45mm Approximate Case Thickness: 15mm Approximate Lug Width: 22mm