Keywords: Cover US 1856 New York.jpg Cover mailed in New York 1856 Stamps Scott 7 II and 9 IV 1851-1857 imperforate stamp issue 1 cent blue Scanned April 2005 by User Stan Shebs PD-USGov 1851 stamps of the United States Postal history of the United States Stamps on covers and postcards Blue stamps 1856 covers of the United States |