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J. Beardshaw and Son Ltd. of Baltic Steel Works, Sheffield.
1819 Company founded by Jonathan Beardshaw.
1863 Dissolution of the Partnership between George Beardshaw, Vickers George Beardshaw, Jonathan Beardshaw, and William Beardshaw, in the trades or businesses of Merchants and Manufacturers of Steel, Files, Saws, and other articles, under the style or firm of Jonathan Beardshaw and Son, at the Baltic Works, Attercliffe, in the parish of Sheffield, in the county of York. The partnership will be carried on by Vickers George Beardshaw, Jonathan Beardshaw, and William Beardshaw, under the style or firm, in co-partnership with their Brothers, Charles Calow Beardshaw and Edward Taylor Beardshaw
1893 Private company.
1913 Advert for high-speed tools for cold metal. J. Beardshaw and Sons of Conqueror Steel Works, Sheffield 
1914 J. Beardshaw and Son; manufacturers of steel, saws, files and twist drills. Specialities: high-speed steel and tools. Employees 200. 
1920 Issued catalogue of 'Conqueror' steels and articles made from it. 
1937 Steel, saw and tool manufacturers. "Conqueror" Steel Products. "Invincible" Steel Products. "Vigilant" Steel Products. 
1961 Steel manufacturers, rollers and forgers of all qualities of high speed, tool, stainless, alloy and carbon steels. Manufacturers of saws and engineers' small tools. 350 employees. 
Later Beardshaw Senior Steels was on this site.
1971 J Beardshaw and Son, a holding company, of Baltic Steel Works, was in liquidation