Movement Caliber Number 6R15 Movement Type Automatic with manual winding Accuracy +25 to -15 seconds per day Duration Approx. 50 hours Exterior Case Material Stainless steel (super hard coating) with stainless steel bezel Crystal Curved sapphire crystal 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 Other Details Water Resistance 200m / 660ft diver's Case Size Thickness: 13.8 ㎜ Diameter: 42.6 ㎜ Other specifications Screw-down crown Unidirectional rotating bezel Other features 23 jewels Date display Stop second hand function