Oliver built tractors for Cockshutt in the late 30s through the 40s. Oliver 60 was repainted red to be a Cockshutt 60 etc. Cockshutt knew that after the war Oliver wouldn't be able to keep up with the demand. So they came up with the 30. From 1947-1962 Cockshutts built where true Cockshutts built by Cockshutt.missouri massey man said:Very good info sir. Now what exactly is the association with Oliver ?? Was it before the Black Hawk, 30, 40 and 50 series ? They certainly are stout looking, I agree.