Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,487 pages of information and 233,925 images on early companies, their products and the people who designed and built them.
of Sheffield, Yorkshire
c.1900 Thomas Firth and Sons established a tools department.
1930 Thomas Firth and John Brown established.
1936 The Engineers Tools Department was especially valuable in helping customers machine the parent company's steel products..
1937 Advert for Firth-Brown Engineers' Tools. Products for the Engineers' Tool Department, including the New Drill Point Grinder, Files, Hacksaws, "Insto" Metal Saws, Milling Cutters, Reamers, and other items made from Firth Speedicut High speed Steels. (Engineering/Metals/Quarry, Roads and Mining/Transport Section - Stand No. D.408) 
1946 Firth Brown Tools Ltd was incorporated as a Public company for the purpose of acquiring from Thomas Firth and John Brown Ltd the business based on the tools department which had been established c.1900.
1960 Advert. 'Speedicut' tools. (of Speedicut Works, Carlisle Street East, Sheffield) 
1961 Manufacturers of engineers cutting tools, saws, files, light instruments and hard metal tipped tools. 1,750 employees.