Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 135,687 pages of information and 217,205 images on early companies, their products and the people who designed and built them.
1912 Listed in Spennell's directory of Coventry as Motor Car Manufacturers. 
1912-1913 Manly Buckingham cars made in Coventry
Also see Buckingham Engineering Co