Specifications Movement Caliber Number 8L35 Movement Type Automatic with manual winding Precision +15 to -10 seconds per day Power reserve Approx. 50 hours Jewels 26 Functions 28,800 vibrations per hour (8 beats per second) Stop second hand function Date display Case/Band Case Material Stainless steel Case Size Thickness:13.4mmDiameter:42.6mmLug-to-lug:49.3mm Crystal Dual-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 300m / 1000ft diver's Magnetic Resistance 4,800 A/m Weight 196.0g Features Unidirectional rotating bezel Screw-down crown Three-fold clasp with secure lock Screw case