The 4-cent Pony Express commemorative stamp was issued on July 19, 1960, through the Sacramento, California, post office. It was issued to commemorate the centennial of the Pony Express.
Designed by Harold von Schmidt, the stamp depicts a Pony Express rider on his stead in full gallop. This image is superimposed over a rendition of a map showing the journey from St. Joseph to Sacramento, the route that the Pony Express serviced.
The stamp was printed by the rotary process, electric-eye perforated, and issued in panes of fifty stamps each. An initial printing of 120 million stamps was authorized.
Postal Bulletin (June 2, 1960).