2Jewellery Mechanical Watch Movement: CAL12201 Movement Model: 1933 Drive: single-spring drive Power reserve: 80 (hours) Vibration frequency: 28800 (times) Winding method: automatic winding Case Diameter: 41mm Case Thickness: 12.2mm Strap width: 21mm Case material: 316 fine Strap material: Italian calfskin Waterproof depth: 50 meters life waterproof Crown: straight in Mirror: artificial sapphire Buckle: Folding buckle Crown: straight in