Caliber Number V192 Movement Type Solar Accuracy ±15 seconds per month Duration Operating for approx. 6 months (when fully charged) Exterior Case Material Stainless steel Crystal Sapphire crystal LumiBrite Lumibrite on hands, indexes 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: 13.7 ㎜ Diameter: 44.5 ㎜ Length: 51.6 ㎜ Weight 187.0 g 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-hour hand Chronograph up to 60 minutes in 1/5 second increments Date display Display function of resuming electric power generation. Equipped with small seconds hand Overcharge prevention function