ABC 3 hp motorcycle, 1921.
© Science Museum / Science & Society Picture Library
Founded by Granville Bradshaw, All British Cycles (ABC) began producing motorcycles in 1913. Their designs were noted for incorporating innovative features, such as the introduction of a transversely-mounted flat twin-cylinder engine in 1918, and their 398cc Sopwith 'Machine' of 1919, which caused as ensation at the annual motorcycle show. ABC also developed a 123cc motor scooter, the 'Skootamota', in 1919, but by the early 1920s, production problems led to escalating costs, and in 1923 the company stopped manufacturing.