Why are Vermont Coppers almost always worn and flawed?

I saw this nice example (not mine) but it seems they are super rare in graded PCGS holders. Any idea why? What am I missing?
Vermont Copper
Vermont Copper
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One other factor that comes into play, at least for the counterfeiters during the colonial and confederation (1792 - 1789) period is that some coins were made to look worn from the beginning. The logic was that if a coin looked worn then that was evidence that someone else had accepted it and used it as money. Therefore if other people thought that it was okay and "good money" then it might be safe to do the same. I don't know if that applied in the thinking behind the production of the Vermont coppers, but it could have been
AND one must realize that some of the later Vermont coins were made at Machin's Mills which did make counterfeit coins at the same time as they were making legitimate coins that were made to look worn from the beginning.
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