Kelleher Auctions to show five Inverted Jenny stamps together in Boston

By AI, Created 10:55 PM UTC, May 20, 2026, /AGP/ – Kelleher Auctions will display five of the famous Inverted Jenny misprinted stamps side by side for the first time in Boston during the Boston 2026 World Expo, alongside other rare collectibles worth a reported $20 million. The exhibit runs May 23-30 at the Boston Convention and Exhibition Center and includes items tied to baseball, the postal service and American history.

Why it matters: - The exhibit brings together five of the rarest and most recognizable U.S. stamp errors in one public display. - The collection is part of a reported $20 million showcase of historic stamps and other collectibles. - The display expands Kelleher Auctions beyond philately into broader high-end collectibles.

What happened: - Kelleher Auctions will exhibit five Inverted Jenny stamps at the Boston 2026 World Expo at the Boston Convention and Exhibition Center from May 23-30, 2026. - The stamps will be shown together in Boston for the first time. - The exhibit also includes a rare Babe Ruth 1916 Boston Red Sox baseball card. - The Boston 2026 World Expo is at the Boston Convention and Exhibition Center, 415 Summer Street. - Public admission is free. - The expo is open Saturday, May 23 through Friday, May 29 from 10 a.m. to 6 p.m. - The expo is open Saturday, May 30 from 10 a.m. to 3 p.m.

The details: - The Inverted Jenny is a 24-cent U.S. airmail stamp printed in 1918 with a Curtiss JN-4 biplane shown upside down. - Thousands of sheets were printed, but one misprinted sheet of 100 stamps was sold at a post office in Washington, D.C. - The 24-cent stamps were issued on May 13, 1918, for the first U.S. airmail flights that began two days later. - A stamp collector bought the misprinted sheet over the counter in Washington on May 14 and later sold the full sheet for $15,000. - The exhibit includes a letter from 1876 addressed to a soldier killed at Custer’s Last Stand and returned with the note, “Killed In Battle/on Little Big Horn River/June 25th 76.” - The exhibit includes a 1790 document signed by then-Secretary of State Thomas Jefferson that extended a temporary Congressional act establishing the post office. - Other items on display include early cards of Ty Cobb and Lou Gehrig. - The exhibit also includes rare gold and silver coins. - The exhibit includes a $50 “Independence” Colonial-era bank note issued in North Carolina in 1780 during the Revolutionary War. - Kelleher Auctions is based in Danbury, Connecticut, and was founded in Boston in 1885 as a stamp auction company.

Between the lines: - The Boston show positions the auction house as more than a stamp specialist by pairing philatelic rarities with sports memorabilia, coins and colonial paper money. - The Inverted Jenny remains a standout because the error is easy to understand and the surviving examples are scarce. - The mix of items suggests Kelleher Auctions is using the expo to reach collectors across multiple markets, not just stamp buyers.

What’s next: - Visitors can see the exhibit at Super Booth #300 during the Boston 2026 World Expo. - Kelleher Auctions is directing questions to its website, email and phone line for additional information. - The public display runs through May 30, giving collectors and casual visitors a one-week window to view the items.