- Caliber 4R36 - Automatic caliber - 21,600 vibrations per hour (6 beats per second) - 41 hours Power reserve - Stainless steel case (hard coating) - Hardlex glass - Screw case back. Screw-down crown - Case diameter: 45.0 mm, Thickness: 13.1 mm - Water resistance: 200m diver’s - Unidirectional rotating bezel - Magnetic resistance: 4,800 A/m - Silicone strap - 24 Jewels