2JewelleryMovement Men' S Watches. Movement: CAL.7H50 Movement model: 1961 Drive: single spring drive Power storage: 80 (hours) Vibration frequency: 28800 (second hour) Chain-up mode: automatic chain up Case diameter: 42mm Case thickness: 11.5m Band width: 19.6-27.8mm Case Material: 316 fine steel Band material: rubber Waterproof depth: 30m domestic waterproof Mirror surface: S artificial sapphire Buckle: folding buckle Crown: straight in