!206 and Tom G.
The Co-ops were actually Cockshutts and re-labeled
as Co-ops. I know that Farmers Union (A co-op based out of St Paul, MN) sold Cockshutts that were re-labeled (and maybe even re-painted?)
I worked for a ND farmer who owned one labeled "Co-op" which he bought through his local Farmers Union Oil dealer. I ran it a little and it was DIRTY. You sat so low that lots of chaff and dust was blown onto the operator!!