Masey Harris 12-20 tractor, 1929.
© Science Museum / Science & Society Picture Library
Masey Harris Model 12 '12-20' agricultural tractor on steel wheels, made by the Masey Harris Company, Racine, Wisconsin. Esentially a 4-wheeled Wallis Cub, the manufacturer of which was bought by Masey Harris from J I Case Plow Company in 1928. The Cub was the first unit construction tractor to be made in quantity, and Masey Harris continued upgrading the design until the early 1940s. The Wallis tractor design was also made under license in the UK by Ruston of Lincoln.