The most common type of pre-selector gearbox was the Wilson, which used an epicyclic design. A precursor to the Wilson gearbox was the manually-controlled epicyclic gearbox used in the 1901-1904 Wilson-Pilcher cars built in the United Kingdom. One of the company directors, Walter Gordon Wilson, had become an advocate for the benefits of the epicyclic gearbox, which allowed large torques to be transmitted whilst still being controllable through a small input force. Walter Wilson was a major co-inventor of the armoured tank during and after World War I, and was responsible for the 1918 British Mark V tank using an eypicyclic steering gearbox. The Lanchester Motor Company in the United Kingdom also produced cars with manually-controlled epicyclic gearboxes from 1900 and built an experimental tank (the "Lanchester Gearbox Machine" or "Experimental Machine K") fitted with an epicyclic gearbox.