Specifications: Movement Caliber Number 4R36 Movement Type Automatic with manual winding Duration Approx. 41 hours Exterior Crystal Sapphire crystal with magnifier Crystal Coating Anti-reflective coating on inner surface LumiBrite LumiBrite on hands and indexes Clasp Three-fold clasp with secure lock , push button release with extender Other Details Water Resistance 200m / 660ft diver's Case Size Thickness: 13.2 ㎜Diameter: 45 ㎜Length: 47.7 ㎜ Weight 198.0 g Other Specifications Screw case back Screw-down crown Three-fold clasp with secure lock Unidirectional rotating bezel Other Features 24 jewels Day/Date display Stop seconds hand function