Specifications: Movement Caliber Number 4R36 Movement Type Automatic with manual winding Duration Approx. 41 hours Exterior Case Material Stainless steel Crystal Hardlex with lenses 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: 13.4 ㎜Diameter: 42.4 ㎜Length: 49.4 ㎜ Other Specifications Screw case back Screw-down crown SPECIAL EDITION on the case back Three-fold clasp with secure lock Unidirectional rotating bezel Other Features 24 jewels Day/Date display Stop second hand function