Movement Caliber Number 4R35 Movement Type Automatic with manual winding Power reserve Approx. 41 hours Jewels 23 Functions Stop second hand function Date display Case/Band Case Material Stainless steel Case Size Thickness:12.3mm Diameter:41.7mm Lug-to-lug:49.5mm Crystal Hardlex LumiBrite LumiBrite on hands, index(es) and bezel Clasp Three-fold clasp with secure lock , push button release with extender Distance between lugs 20 Other Details Water Resistance 200m / 660ft diver's Magnetic Resistance 4,800 A/m Weight 170.0g Features Unidirectional rotating bezel Screw-down crown Three-fold clasp with secure lock Screw case back