Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,535 pages of information and 233,960 images on early companies, their products and the people who designed and built them.
Brett's of Coventry.
1912 Listed in Spennell's directory of Coventry as Spanner Manufactuers. 
1961 Manufacturers of carbon and alloy steel drop forgings, and hot yellow metal pressings. 230 employees.