Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,440 pages of information and 230,058 images on early companies, their products and the people who designed and built them.
of Excelsior Works, Oxford Street, Birmingham.
1936 Public company.
1937 Windscreen manufacturers. 
1939 See Aircraft Industry Suppliers
1961 Manufacturers of motor and aircraft accessories, fittings for motor buses, commercial vehicles and railway coaches, caravan windows and aluminium sinks. 650 employees.