Model No:S205050 Movement:Japan Seiko VK64 Chronograph Quartz Movement VK64 Movement Feature:Flyback, Chronograph Minute Dial at 9 O'clock, 24 Hours Dial at 3 O'clock Mirror: Sapphire Mirror + AR Coating Case: 316L Stainless Steel Strap Material:Genuine Leather Strap Crown:Screw-down Crown Back:Screw-down Solid Steel Back Case Diameter:39mm Dial Diameter: 32.5mm Case Thickness:12.8mm Strap Width:20mm Lug To Lug: 46.7mm Waterproof:50m Buckle:Steel Buckle Weigth:70g.