Caliber Number 6R35 Movement Type Automatic with manual winding capacity Accuracy +25 to -15 seconds per day Case Material Stainless steel (super hard coating) Crystal Curved sapphire Crystal Coating Anti-reflective coating on inner surface LumiBrite Lumibrite on hands, indexs and bezel Clasp Three-fold clasp with secure lock , push button release with extender Water Resistance 200m / 660ft diver's Case Size Thickness: 13.2 ㎜ Diameter: 40.5 ㎜ Length: 47.6 ㎜ Other Specifications Screw case back Screw-down crown Three-fold clasp with secure lock Unidirectional rotating bezel Other Features 24 jewels Date display Stop seconds hand function