Caliber Number 4R34 Automatic Movement with manual winding Power reserve Approx. 41 hours Jewels 24 24-hour hand (dual time display function) Stop seconds hand function Stainless steel Case (hard coating) Case Thickness:13.6mm Case Diameter:39.4mm Lug-to-lug:47.9mm Crystal Curved Hardlex LumiBrite on hands and index(es) Calfskin Band Distance between lugs 20 Water Resistance 10 bar Magnetic Resistance 4,800 A/m Weight 79g See-through & Screw case back