1985 is this where maybe it had bubbles but they popped

is this a bubble penny rhat the bubbles may have popped or pmd ?

 

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They are popped which is the same as PMD.

The copper plating was compromised affecting the inner zinc core.

 

More environmental exposure and this will happen

 

Ok thanks was thinking bubble that popped afer leaving mint but was not totally sure.

Can open attachment says error

 

Can't open attachment

 

Try this one

 

It is definitely PMD

 

So corrosion domes sounds like this one

 

Ok now that i see your definite envioment

Thanks for pictures

 

Now that the bubbles have popped the Zinc will start to rot faster.