1991 error dime? P mint

Hi, can anyone help me with this? I've seen a few on other searches and wonder if anyone would know? I don't think it's a dryer coin and I don't think someone spooned it cause there isn't any mushrooming beside a thicker rim that looks like a penny. It's also same weight of a dime. The only thing that's different is you can see all three layers and and the rim is nice and wide all the way around.

 

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Here's a comparison

 

It's simple damage, sir; nothing less or more.

 

I haven't done this in a long, long, long time. Hold a coin by the obverse and reverse loosely between your thumb and forefinger, rolling it back and forth on a flat surface with just enough downward pressure to flatten the reeds on the edge. Unlike spooning, this doesn't cause the edge of the coin to expand too much.

Chris

 

Ok that's cool, so it is post mint damage?

 

Yes - it's PMD