Inverted Jenny: An Incredibly Rare Stamp
The “Inverted Jenny” is the 1918 U.S. 24-cent airmail stamp (Scott C3a), released to inaugurate scheduled airmail service on the Washington–Philadelphia–New York route. Its engraved center vignette depicts the Curtiss JN-4 “Jenny,” the sturdy biplane trainer that carried those first airmail flights.
The airplane is printed in blue inside a carmine rose and blue frame reading “U.S. POSTAGE” and “24 CENTS.” On the error version, the entire blue center (airplane included) was printed upside down relative to the frame, a startling mistake that made the stamp instantly famous.
Why the Inverted Jenny Is So Crazy Rare
The stamp’s production required two passes through the printing press: one for the red frame and one for the blue center vignette. During that second pass, a single sheet of 100 stamps was fed upside down, inverting the airplane.
Stamp collector William T. Robey bought the sheet at a Washington, D.C., post office on May 14, 1918. He immediately recognized the error on the stamp, and purchased every remaining example on hand. He sold the sheet to Philadelphia dealer Eugene Klein for $15,000, and Klein resold it to collector Colonel Edward H. R. Green for $20,000.
Green then broke the sheet into singles and blocks, scattering all 100 examples. Because only that one error sheet ever reached the public (and no others have surfaced) the Inverted Jenny remains one of philately’s most celebrated rarities.
Auction Prices and Record Sales
The Inverted Jenny’s value depends heavily on condition and its position within the original sheet. Sound, well-centered singles typically sell in the mid-six figures, while exceptional examples have crossed seven figures: a particularly fine single brought about $1.35 million in 2016, and other strong singles have repeatedly exceeded $1 million.
Multiples command premiums, with a block of four selling for roughly $1.7 million in 2018 and top blocks later approaching or surpassing $2 million. Even damaged or off-center examples trade for hundreds of thousands of dollars. Several Jennys have been stolen over the years and later recovered, a drama that only deepens demand for a stamp prized as much for its story as for its scarcity.
Other Legendary Rare Stamps
The Inverted Jenny belongs to a small club of world-famous rarities. The 1856 British Guiana 1-cent Magenta—the only known example of its kind—sold in 2021 for about $8.3 million, among the highest prices ever paid for a single stamp.
The U.S. 1868 1-cent “Z” Grill, of which only two copies exist, fetched roughly $4.4 million in 2024, a record for a U.S. stamp. Sweden’s 1855 Treskilling Yellow, a famous color error, has repeatedly sold for more than $2 million.
Early colonial icons such as the 1847 Mauritius “Post Office” one-penny and two-pence stamps and the 1851 Hawaiian Missionaries also trade in the seven figures. Each shares the Inverted Jenny’s appeal: a tiny printing mistake or limited survival transformed ordinary postage into treasure.
Wear the Inverted Jenny on Quality Merch
Show your love of stamps and this rare stamp in particular on various items of merch.
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