Driving system Automatic with manual winding mechanism Caliber Number 4R38 Case Stainless steel case Case back: stainless steel and glass Glass Box shaped glass Drive duration Power reserve: 41 hours Water resistance 5 bar water resistance Magnetic reluctance Magnetic resistance H40.4mm x W33.8mm x D11.3mm See-through case back Screw case back Jewels: 24 jewels Stop second hand function Packaging: New in box with manual