Sunbeam Cycles made by John Marston Limited of Wolverhampton was a British brand of bicycles and, from 1912 to 1956 motorcycles. On John Marston's death after the First World War it was bought by Nobel Industries, Nobel became ICI. Associated Motor Cycles bought it in 1937; then, BSA bought Sunbeam in 1943. Sunbeam Cycles is most famous for its S7 balloon-tyred shaft-drive motorcycle with an overhead valve in-line twin engine.