Calibre Number 6R31 Automatic Movement with manual winding 25 to -15 seconds per day precision Approx. 70 hours Power reserve Jewels 24 Stop seconds hand function Stainless steel Case Case Thickness:12.4mm Case Diameter:40.5mm Lug-to-lug:48.8mm Dual-curved sapphire crystal Anti-reflective crystal coating on inner surface Three-fold clasp with push button release Distance between lugs 20 Water Resistance 10 bar See-through case back Screw case back Arita Porcelain Dial