Movement Caliber Number 6R31 Movement Type Automatic with manual winding Duration Approx. 70 hours Exterior Case Material Stainless steel Crystal Dual-curved sapphire crystal Crystal Coating Anti-reflective coating on inner surface Clasp Three-fold clasp with push button release Distance Between Lugs 20mm Other Details Water Resistance 10 bar Case Size Thickness: 12.4 ㎜ Diameter: 40.5 ㎜ Length: 48.8 ㎜ Other features See-through case back Screw case back Arita Porcelain Dial