Here’s a look at some of the 12 most valuable American ... after American stamps. This set represents the dawn of airmail service in the U.S., a significant milestone in postal history.

The stamp, seen here with Siegel Auctions President Scott Trepel, once famously featured in an episode of the Simpsons A rare US postage stamp has sold for $2m (£1.63m) in a New York auction ...

An upside down ship makes this commemorative stamp one of the most famous and valuable American postal errors of all. Find ...

These are the most valuable ... The only known stamp of its kind, the Alexandria Blue Boy is a circular blue stamp issued in 1847 or 1846 (it’s said to have been used as postage for a love ...

It costs 60 cents to send a domestic 1-ounce, standard-sized envelope through the United States Postal Service ... t be able to purchase stamps individually. And most stores only carry them ...