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