The listing, Used U.S. Stamp #1142 4¢ Francis Scott Key Credo-Possible Free Shipping has ended.
The Post Office Department issued the fourth stamp in the American Credo Series on September 14, 1960, at Baltimore, Maryland. The 4-cent stamp features a phrase from the National Anthem, written by Francis Scott Key during the bombardment of Fort McHenry during the War of 1812: "And this be our motto, in God is our trust." Like the other stamps of this series, the 4-cent Key paid the postage for a one-ounce domestic-rate letter.