Model No:SF745 Movement:Japan VH31 Quartz Movement Battery:SR920SW Case Material:316L Stainless Steel Mirror:Sapphire Mirror+AR Coating Strap:Nylon Strap Back:Screw-down Back Case Diameter:36mm Case thickness:13.35mm Lug To Lug:41.5mm Strap Width:18mm Weight:75g Mirror Size:30.03.80mm (DiameterThickness) Crown Style:Screw-down Crown Crown Diameter:10mm Luminous:C3/BGW-9 Luminous Waterproof:200m Hands Length:9.251313mm(Hour HandMinute HandSecond Hand).