That is a CO-OP corn picker built before Cockshutt bought the Company. It was built by the National Farm Machibery Cooperative in Bellevue, Ohio and Shelbyville, Indiana. They were sold by the different state CO-OP's in the mid west.
Cockshutt later bought the company, but they didn't build any pickers. Instead, they sold pickers built by Oliver, Moline or Massey.