2020 cent nice MAD... I assume everything else is PMD

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Looks to me like it's caused from a Grease filled die

 

I agree plus some damage.

 

PMD, MAD, GFD depending on where you look on the coin.

 

So far I really don't see a MAD. Nor do I see PMD.
It is a nice grease filled die.

 

I see a very minor MAD, which is very common, so NAV. As to the reverse, that's curious PMD, as I would expect to see some zinc showing through as it looks like it was rubbed against something abrasive.

 

Die Deterioration strike. Worn die issues.
Struck through grease.

Here's an extreme example from my collection.

 

Those lines are in the planchet before the strike.