2Jewellery Vintage Watch. Movement: CAL.H520 Movement model: 1910L Drive: double spring drive Power storage: 42 (hours) Vibration frequency: 21600 (times/hour) Winding method: manual winding. Case diameter: 43-37.5mm Case Material: Carbon Fiber Band material: rubber Waterproof depth: 50m domestic waterproof Mirror surface: synthetic sapphire Buckle: folding buckle Crown: straight in