Specifications : Movement Caliber Number 4R35 Movement Type Automatic with manual winding Power reserve Approx. 41 hours Jewels 23 Functions Stop seconds hand function Date display Case/Band Case Size Thickness:12.0mm Diameter:40.8mm Lug-to-lug:47.0mm Crystal Box-shaped Hardlex LumiBrite LumiBrite on hands and index(es) Distance between lugs 20 Other Details Water Resistance 5 bar Features See-through & Screw case back