Movement Caliber Number 6R35 Movement Type Automatic with manual winding Accuracy +25 to -15 seconds per day Duration Approx. 70 hours Exterior Case Material Stainless steel Crystal Sapphire crystal LumiBrite LumiBrite on hands, index(es) 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: 12.9 ㎜ Diameter: 45 ㎜ Length: 52.6 ㎜ Weight 188.0 g Other Specifications Screw case back Screw-down crown Unidirectional rotating bezel Other Features 24 jewels Date display Stop second hand function