GLOBEALERT
WORLD● LOWSep 17 · Sep 17, 2026, 2:29 PM

In 1918, a Washington employee paid 24 dollars for 100 stamps and realized that all the planes on the sheet were upside down: a century later, an auction sold one as the most expensive US stamp in history

Clarín · north america

One of its copies became, a century later, the most expensive US stamp sold at auction.

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