IWC was the first manufactory to use titanium in watchmaking and to apply this technology to its cases. For 147 years, every watch produced by IWC has been registered in the factory register of watches, the only one in the world. British Prime Minister Winston Churchill and other dignitaries have owned more than one IWC pocket watch. IWC's diver's watch has a modern look and is the only diver's watch with a mechanical bathymetry that is not afraid of water depths of 2,000 meters. The lack of a helium escape valve in terms of professional functions makes it more suitable for saturation diving.