I wasn't aware of that story, thanks for mentioning it! For anyone else that is curious, it was in 1958 and here[0] is a link to a PDF [0] https://about.usps.

I wasn't aware of that story, thanks for mentioning it! For anyone else that is curious, it was in 1958 and here[0] is a link to a PDF [0] https://about.usps.com/who-we-are/postal-history/hope-diamond.pdf https://about.usps.com/who-we-are/postal-history/hope-diamon...