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

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)

Non-Denominated U.S. Stamps