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Cooper Steam Digger Co of Steel Works, King's Lynn.
Company established by Thomas Cooper who was previously the MD of the Farmers Foundry Co
1894 June. Royal Agricultural Society's Show. Steam digger 
1904 W. M. Pryor became joint-MD
1909 November. Details of the Cooper Two-stroke engine.
1909-1910 Produced the 'Cooper' automobile. Six made. One exists.
After the death of Thomas Cooper the business was taken over by Cooper Roller Bearing Co