1957

The Fourth National Jamboree
Valley Forge, Pennsylvania

The Merin Studios produced a series of twelve postcards, two colors (green and brown) for each of six different designs.

The Thunderbirds performed at the Jamboree and gave away postcards commemorating their appearance as well as the twenty-fifth anniversary of the United States Air Force.

The Boys' Life Exhibit gave away postcards showing "Pedro."

Scouts from New York Jamboree Troop 15, which was headed to the International Jamboree in England, added a cachet with the Universal Scout Emblem.  Then at the stamp exhibit, they had a cachet added to the address side of the cards and had them canceled with a Jamboree slogan cancellation.

Pepsi Cola created an over-sized advertising postcard which they gave away at  the Jamboree.