A that led to the David Brown line of tractors in 1939). In order to get volume production with lower costs, following a demonstration of his tractor before Henry Ford Senior in October 1938, Ferguson made a gentlemen's agreement with Ford, also referred to as the handshake agreement, to produce the Ferguson tractor in Detroit starting in mid-1939. Officially called the Ford Tractor Ferguson System they are more commonly known as the Ford-Ferguson. . The first Ford-Ferguson 9N (for 1939 model N) tractors arrived in the United Kingdom in October, 1939 and thousands would be imported to help with food production during the War. In 1942 due to material shortages after the USA entry into the War the model was updated to the 2N (for 1942 model N). About 300,000 of these tractors, known as "Ford-Fergusons", were produced up to 30 June 1947. During the war years, the Ferguson design team developed many improvements to both tractor and implements and started to make arrangements to manufacture in the United Kingdom. The agreement with Ford in 1938 was to include production at the Ford plant at Dagenham, Essex, but the UK Ford company would not do it. By 1945, Ferguson had made a manufacturing agreement with the Standard Motor Company of Coventry to produce a Ferguson tractor incorporating all their latest improvements and to be known as the TE20. As well as allowing Ferguson to get his tractor into full production, the deal was of great benefit to Standard, because the tractor would be built in its huge "shadow factory" which had been an aero engine plant during World War II but was then standing empty. Standard developed a new wet-liner engine for the tractor, and for Standard's road cars, such as the Vanguard. Production started in the late summer of 1946, nearly a year before the last Ford Ferguson came off the line in Detroit in June 1947. The break with Ford left Harry Ferguson and his US company with implements to sell but no tractors. To make up the gap until the new Ferguson factory in Detroit started in October 1948, more than 25,000 Coventry-built TE20s were shipped to the US and Canada. The TO (Tractor Overseas) 20 was virtually the same as the TE20 with a Continental engine Z-126 fitted instead of the Standard engine. At the time of its introduction the Ferguson three-point linkage was unique to