Duro Corporation made the first Massey 4 wheel mowers, followed by Beaver MFG which built the first year MF-10 in 1965, In 1966 taking the Beaver MFG design AMP of West Des Moines, Iowa built the MF-10 and in 1967 added the MF12H Hydrostatic model. The MF series continued with 8-16 hp models. The Tecumseh powered tractors were MF-7, MF-8, MF-10, and MF-12 hp models and Kohler powered machines were the MF-14 and MF-16. July of 1976 was the last of the MF series and the newer 1000 series (1200, 1600, 1450, 1650, 1655, and 1855) appeared in the fall of 1976 as the 1977 model year, that series only had a 2 year run until 1979 and there wan't another Massey mower for nearly 10 years after that. The next Massey tractors were built by Case/Ingersoll and were copies of there 200 and 400 series mowers, that run also only lasted two years and then Simplicity was contracted to build Massey mowers in the late 80s early 90's and have ever since. Massey never actually produced any lawn and garden machine themselves.