Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,100 pages of information and 233,633 images on early companies, their products and the people who designed and built them.
1958 Formed by Crystalate Ltd
1985 The main business of making telephone components was damaged by the privatisation of British Telecom; Welwyn was a growth business
1990 Bought by TT Electronics