Movement Caliber Number 8L35 Movement Type Automatic with manual winding Accuracy +15 to -10 seconds per day Duration Approx. 50 hours Exterior Case Material Stainless steel (super hard coating) 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 Other Details Water Resistance 200m / 660ft diver's Case Size Thickness: 13 ㎜ Diameter: 44 ㎜ Length: 49.3 ㎜ Weight 185.0 g Other Specifications Screw case back Screw-down crown Three-fold clasp with secure lock Unidirectional rotating bezel Other Features 26 jewels Date display Stop second hand function