Here is a short video on the 1918 24¢ Air Post Issue and the Inverted Jenny, also known as the Upside-Down Airplane Stamp, the world’s most famous stamp. Siegel Auction Galleries has sold examples of the Inverted Jenny for record prices. The Siegel firm achieved the highest price ever paid for a U.S. stamp ($2.97 million) for the Inverted Jenny plate block, which was traded by Bill Gross, the celebrated bond investor, for a stamp he needed for his collection.
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