That's better.

This site has a bio of Peter Volid, the King Korn King:

". . .in 1953, fifteen Iowa food merchants put together the money to start a stamp business and asked Mr. Volid to run it. The business was called King Korn Stamp Co. and was set up to compete with S&H Green Stamps. He took the company that was worth $350,000 in its first year to $75 million in 1966 when he retired. "

That was but one of Mr. Volid's ventures; he was also a marshmallow magnate as a young man.

How Corn, let along corn that wears the mark of monarchy, became associated with trading stamps, I don't know. They went bankrupt in 1975, and the mascot, shrieking and screaming, was convrerted into feed for animals.