Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,955 pages of information and 228,874 images on early companies, their products and the people who designed and built them.
Excelsior Motor Manufacturing and Supply Company was an American motorcycle manufacturer operating in Chicago from 1907 to 1931. It was purchased by Ignaz Schwinn, proprietor of bicycle manufacturer Arnold, Schwinn & Co. in 1912.
In 1912, an Excelsior was the first motorcycle to be officially timed at a speed of 100 mph.
The Henderson Motorcycle Company became a division of Excelsior when Schwinn purchased Henderson in 1917.