Driving System: Automatic (manual winding capability) Caliber: No. 4R57 Case: Stainless steel Band: Stainless steel Glass Material: Top Sapphire crystal Waterproof: Water resistance 10 Bar Antimagnetic Magnetic resistance 4,800 A/m Size: 42.0mm Features Power reserve indicator Date indicator Screw see-through case back Power reserve: Approximately 41 hours 21,600 vibrations per hour 29 jewels