Specifications Movement Caliber Number 4R36 Movement Type Automatic with manual winding Power reserve Approx. 41 hours Jewels 24 Functions Stop second hand function Day/Date display Case/Band Case Material Stainless steel Case Size Thickness:13.4mm Diameter:45.0mm Lug-to-lug:47.7mm 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 22 Other Details Water Resistance 200m / 660ft diver's Magnetic Resistance 4,800 A/m Weight 198.0g Features Unidirectional rotating bezel Screw-down crown Screw case back