Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,881 pages of information and 228,796 images on early companies, their products and the people who designed and built them.
of 54 and 55 Bunhill Row, London EC.
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1894 June. Royal Agricultural Society's Show. Sheaf-binding harvesters, Mowers, Reapers, Tedders. 
Over the next few years they were able to buy out smaller agricultural companies, thereby adding to their product range.
1908 Incorporated as a Limited Company.
In 1910 they bought out a producer of petrol engines, Deyo-Macey, and this was the start of building their own engines.
1914 Specialities: Harvesting and Cultivating Machinery of Canadian Manufacture. 
In 1917 Massey-Harris entered the tractor market
1928 Bought the J. I. Case Plow Works Co
1930 They took over the H. V. MacKay Co of Australia
1935 James S. Duncan is General Manager
c1939 Introduced the first self-propelled combine harvester
1944 James S. Duncan is President of the company
1948 Started tractor production in the UK - first in Manchester and then they moved to Kilmarnock