Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,159 pages of information and 233,681 images on early companies, their products and the people who designed and built them.
1939 Private company.
1950 Reconstruction of J. Stone and Co to be a holding company; the existing subsidiaries Stone-Wallwork Ltd and Stone Platt Engineering Co Ltd, which had complementary activities, would be merged into one, namely Stone-Wallwork, which would handle the mechanical engineering products; Stone-Platt would be liquidated. The existing 50 percent holdings in Light Metal Forgings Ltd and Stone-Fry Magnesium Ltd would be maintained.
1961 Manufacturers of P.I.V. variable speed gears, transmission gearing foundry equipment and general engineering. 940 employees.