U.S. Stamp Identifier

Get the inside scoop on how to distinguish valuable U.S. postage stamps from the common varieties with our U.S. Stamp Identifier.

	1847 First Issues vs Reprints (#1 vs 3, #2 vs 4)
	1867-1871 Grilled Issues (#85C to 141)
	1869 15¢ Columbus Type I & II (#118, 119)
	1870-1888 Hard and Soft Papers (#134 to 191)
	1873-1879 Secret Marks (#156 to 191)
	1881-1882 Re-engraved Designs (#206 to 209)
	1890 Caps on 2¢ Washington (#220a, 220c)
	1893 2¢ Columbian Broken Hat (#231c)
	1894-1895 2¢ Washington Triangles - Type I, II, III
	1894-95 $1 Perry Varieties (#261, 261A, 276, 276A)
	1895 First Watermarked Issues
	1898 10¢ Webster Types (#282C, 283)
	1908-1922 Washington-Franklin Identifier
	Distinguishing Flat Plate from Rotary Press Printings
	1912-1921 2¢ Washington Types I, Ia, II and III
	1918-1920 2¢ Washington Types IV, V, Va, VI and VII (Offset Printings)
	1908-1918 3¢ Washington Types I to IV
	1917 5¢ Washington Color Error (#467 and 505)
	1923-26 2¢ Washington (#599 vs 599A; #634 vs 634A)
	1995-1997 32¢ Flag Over Porch1995-1997 32¢ Flag Over Porch
	2007-2010 "Forever" Liberty Bell
	2014 "Forever" Flag and Fireworks
	Non-Denominated U.S. Stamps