Movement Caliber Number 6R35 Movement Type Automatic with manual winding Precision +25 to -15 seconds per day Power reserve Approx. 70 hours Jewels 24 Functions Stop second hand function Date display Case/Band Case Material Stainless steel (super hard coating) Case Size Thickness:12.3mm Diameter:41.0mm Lug-to-lug:46.9mm Crystal Curved sapphire crystal Crystal Coating Anti-reflective coating on inner surface 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 156.0 Features Screw case back Unidirectional rotating bezel Screw-down crown Three-fold clasp with secure lock Screw case back