Hello All, Any ideas about what happened to this penny from 1960? Some kind of high-school science experiment, or something else? Thanks!
I wasn't paying attention to emails from the Mint, missed the notice about Buffalo subscriptions being cancelled, and then the 2009 Buffalo sold...
I've been noticing that some items in my proof sets have developed some blurriness... I'm wondering if what I am seeing is oxidation? I will...
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