The Most Valuable Postage Stamps
A guide to some of the most sought-after stamp treasures in U.S. philatelic history
Have you ever wondered which U.S. stamps are in highest demand on the collectors’ circuit, and why? If you’re new to philately or just a curious history buff, you may be surprised to learn that a rare stamp can command millions of dollars at the world’s leading auction houses. These premium prices are generally garnered due to extremely limited production, an unusual printing error, or great historical importance. Some of these stamps have even taken on mythic lives of their own, with on-screen cameos and references in popular culture.
Keep reading to learn about these unique gems and the fascinating histories behind them. Who knows, maybe you’ll be lucky enough to stumble across one at a yard sale or in that box of old letters in your attic!
1. 1868 1-cent Benjamin Franklin Z Grill stamp
Grill stamps have waffle-like impressions (grills), which were used for a brief time in the mid-19th century to prevent someone from erasing the ink that cancels a stamp and reusing it. Only about 1,000 of the 1868 1-cent Benjamin Franklin Z Grills were ever produced, and only two are known to exist. The New York Public Library has one on permanent display at the National Postal Museum, and the other belongs to a private collector who paid $4.37 million for it at a June 2024 auction in New York City.
2. 1867 15-cent Abraham Lincoln Z Grill stamp
Like the Benjamin Franklin Z Grill, just two of the 1867 15-cent Abraham Lincoln Z Grill stamps are documented, making them among the rarest and most valuable of the Z Grills. The stamp depicts an engraving of one of the first portraits of Abraham Lincoln with his iconic full beard, made shortly before he began his first presidential term. In 2024, the more pristine of the two copies sold to a private collector for $2.77 million.
3. 1918 24-cent Inverted Jenny stamp
In a 1993 episode of The Simpsons, Homer finds a sheet of prized Inverted Jenny stamps at a local swap meet but tosses them aside as “junk” because he doesn’t recognize their value. Too bad he didn’t know the fascinating history behind the upside-down treasures!
In 1918, to celebrate the launch of a newly scheduled air mail route between New York, Washington, D.C., and Philadelphia, the U.S. Post Office Department (the predecessor of the U.S. Postal Service) released postage stamps picturing a blue Curtiss JN-4 biplane, nicknamed “Jenny,” inside a red frame. The combination of colors meant that each sheet had to be run through the printing press twice, and at some point during the process, nine sheets of 100 stamps were erroneously inked with the planes upside down. One sheet escaped notice by inspectors and was sold to a savvy collector, William T. Robey, who bought the entire sheet for $24 and a week later sold it to a stamp dealer for $15,000.
Although they typically sell for much less, in 2023, an Inverted Jenny stamp sold at auction for a record-setting $2 million.
4. 1851 2-cent Hawaiian Missionary stamp
More than 100 years before it became a state, the Kingdom of Hawaii issued a series of blue-and-white stamps in 2-cent, 5-cent, and 13-cent denominations. Printed on brittle, onion-skin paper, these delicate stamps took their name from Christian missionaries in the mid-1850s, who were among those sending mail from Hawaii to the mainland. By the end of that century, the rare 2-cent Hawaiian Missionary was coveted to the point that, in 1892, a Parisian stamp enthusiast was murdered by an acquaintance when he refused to sell the stamp. This legendary stamp also plays an important role in the Hollywood movie Charade, starring Audrey Hepburn and Cary Grant, although the 3-cent denomination pictured in the movie never actually existed.
Today, only 15 2-cent Hawaiian Missionaries are known to survive, making them some of the most highly sought-after stamps in the world.
5. 1869 24-cent Declaration of Independence Inverted Center stamp
Long before the famous printing error that produced the 1918 Inverted Jenny stamps, a similar mishap occurred during the print run of the nation’s first bicolored stamp, the 24-cent Declaration of Independence. Created for the groundbreaking 1869 Pictorials series, this stamp, along with nine others, upended the long-established conventions regarding postal stamp images. Aside from a few provisional exceptions, stamps at that time customarily featured former U.S. presidents and political leaders. With the Pictorial series, new images as varied as a Pony Express rider and a steam engine train were also released, permanently expanding what was considered appropriate for a stamp subject.
As with the Jenny stamps, two separate print runs were needed for the 24-cent Declaration of Independence stamp — once to print the central image, and once to print the frame. In all likelihood, one of the sheets was placed upside down, resulting in a limited number of inverted center stamps.
Eighty five of these precious misprints are known to exist today, and those in good condition can easily sell for $1 million or more at private auctions.
