There ya go... International Harvester Company
"In 1919, IH bought the Parlin and Orendorff factory in Canton, Illinois, a leader in plow manufacturing,..."
I am guessing here, but will say P&O stamped on there relates to the above from wikipedia. That's some heavy equipment, Ben ji. I'd say it was used as sod busting tool to turn the prairie over.
So now find a site of IH enthusiasts and start posting pix.
Tom
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