Q: This large expandable postcard has been passed down in my family. It has the years 1789 and 1939 on the front. When it’s closed, it’s 5 by 6 1/2 inches, but it accordions out to 25 inches long. When it expands, it shows an entire set of scenes at the 1939 New York World’s Fair. I have never seen another postcard like it. I’m interested in selling it but can’t find a value.
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