Each stamp from the American Credo Series features a quote from a historically important American. The stamps are fashioned to resemble colonial currency. Also, symbols that relate to the statement are incorporated into the designs, as well as a likeness of the author's signature.
The first of the series contains a statement taken from George Washington's farewell advice to America, specifically those who would be leading the government in the future.
All of the credos are important facets of the uniquely American point of view.
