John Deere tractor, model BR, 1940.
© Science Museum / Science & Society Picture Library
John Deere Model 'BR' agricultural tractor with twin-cylinder horizontal overhead valve gasoline (petrol)/ kerosene engine, manufactured by the John Deere Co, of Moline, Illinois. Probably better known in the UK for their 3-point rowcrop machines, this is a 'standard' version of John Deere's Model B tractor (the 'R' stands for 'Regular'). The model 'B' was introduced in 1936 and ended production in 1947.