Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,110 pages of information and 233,634 images on early companies, their products and the people who designed and built them.
Diamond Tools Advisory Centre, of 1 Old Birmingham Street, London, W.1. "An association of leading firms in the Diamond Tools Industry, with an aim to place the knowledge, gained in many years of specialised work, at the disposal of British Industry."
Companies incorporated in the association:-