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 (Bezel: Stainless steel with ceramic display) Case Size Thickness:13.2mm Diameter:45.0mm Lug-to-lug:47.7mm Crystal Sapphire crystal with magnifier Crystal Coating Anti-reflective coating on inner surface LumiBrite LumiBrite on hands and index(es) Clasp Three-fold clasp with secure lock , push button release with extender Distance between lugs 22 Other Details Water Resistance 200m / 660ft diver's Weight 198.0g Features Unidirectional rotating bezel Screw-down crown Three-fold clasp with secure lock Screw case back