What is PMD in numismatics coins

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Post mint damage (PMD) refers to any damage that occurs to a coin after it has left the mint and entered circulation or been handled improperly. 

This can include scratches, dents, bends, corrosion, chemical reactions, or any other alteration to the coin's surface that was not part of the original minting process.

 PMD can significantly reduce the value of a coin to collectors, as they generally prefer coins in their original, undamaged condition. In contrast, coins with PMD are often considered less desirable for collections or investment purposes.

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