Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 146,992 pages of information and 232,920 images on early companies, their products and the people who designed and built them.
of Dour Iron Foundry, Dover
Later known as A. L. Thomas and Sons
1902 Public company.
1910 Making steam isolating valves branded as D.E.W. valves, intended for use with high pressure isolated steam. 
1949 Company made private.
1956 Company reverted to public company.
1961 Engineers and iron founders, specialising in the manufacture of manhole, duct and trench covers and frame constructions used in roadways, docks, factories and airports. Brand name GATIC. 220 employees.