Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,398 pages of information and 233,518 images on early companies, their products and the people who designed and built them.


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1934. Colpak Coil and Condenser Chassis Unit.
1934. Ferrocart Three Gang Coils.
September 1953.

of Spring Gardens, Romford.

1955 Public company.

1961 Manufacturers of wire-wound potentiometers and variable resistors including high-accuracy precision potentiometers. 650 employees.[1]

1973 Acquired by Royal Worcester[2]

See Also


Sources of Information

  1. * 1961 Dun and Bradstreet KBE
  2. The Times, Nov 03, 1973