Men Power Reserve: Approximately 40 hours Crystal: Domed Mineral Movement: ORIENT Cal. F6724 Automatic, Hand-winding, Hacking Mov’t Clasp: Buckle Water Resistance: 30m Case Material: Stainless Steel Case Diameter: 40.5mm without crown Case Thickness: 11.8mm Dial Color: Jet Black Bezel Material: Stainless Steel Calendar: Date Band Material: Leather (Black) Lug Width: 21mm.