It is PMD. There is no way for that to happen when the coin was being struck. Also there is no such thing as a Post-minting error, it is either an error or Post Minting Damage.
Post Mint Damage and . Here is some further reading you can do about clips to look for in the future, if you see a clip but without the other parts of the coin looking damaged it might be from the mint. https://coins.thefuntimesguide.com/...error-coins/
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