Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 138,146 pages of information and 223,038 images on early companies, their products and the people who designed and built them.
Wellworthy Ltd. of Lymington, Hants., part of the Associated Engineering Group.
1952 Wellworthy Piston Rings changed its name to Wellworthy.
1961 Wellworthy Piston Rings were manufacturers of pistons, piston rings, cylinder liners, valve seats, retaining rings and powder handling compressors. 3,300 employees. 
1963 Motor Show exhibitor. Pistons etc. 
By 1966 Wellworthy had become a major producer of components for the motor industry and were expanding rapidly.
1973 Diesel Engine Components Division of the Associated Engineering Group.