https://invertedjenny.com/
Inverted Jenny: World's most famous stamp
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https://www.ibtimes.co.uk/inverted-jenny-american-stamp-stolen-61-years-ago-returns-home-1563468
'Inverted Jenny' American stamp stolen 61 years ago returns home | IBTimes UK
Jun 3, 2016 - The 1918 stamp was stolen in 1955 when it was on display at a show in Virginia.
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