Keywords: American Bicentennial Washington at Princeton 13c 1977 issue U.S. stamp.jpg en American Bicentennial Washington at Princeton 13c 1977 issue U S stamp 1977-01-03 U S Post Office; http //arago si edu/category_2039132 html National Postal Museum Bureau of Engraving and Printing other versions PD-USGov Commemorative stamps of the United States US multi-colored stamps Stamps of the United States 1971-1977 1977 stamps of the United States Bicentennial Series stamps George Washington on stamps |