Movement Caliber Number 4R34 Movement Type Automatic with manual winding Power reserve Approx. 41 hours Jewels 24 Functions Case/Band Case Size Thickness:13.0mm Diameter:40.8mm Lug-to-lug:47.0mm Crystal Box-shaped Hardlex LumiBrite Lumibrite on hands and index(es) Bracelet Length 200.0mm Distance between lugs 20mm Other Details Water Resistance 5 bar Magnetic Resistance 4,800 A/m Weight 136.0g Features See-through & Screw case back