2Jewellery Wrist Watch For Women Caliber model: 5H20 manual tourbillon Case diameter: 34mm Case thickness: 9.9mm Strap width: 16mm Power reserve: 40 (hours) Case material: 316 fine steel Vibration frequency: 21600 (hours) Band material: belt Winding method: manual winding Mirror: artificial sapphire Swarovite: 81 Waterproof depth: 50m domestic waterproof