The 6-cent stamp marking the 1fiftyth anniversary of Illinois statehood was first placed on sale on February 12, 1968, at Shawneetown, Illinois, the state's oldest post office in continuous operation.
The design was the result of an art contest sponsored by the Illinois Sesquicentennial Commission. The winning entry was created by George Barford, instructor in art at Illinois State University.
The stamp was issued in panes of fifty, with an initial printing of 120 million.
Postal Bulletin (January 18, 1968).