P Harpers ferry doubling?

Morning! I came across a Harper's Ferry P quarter.. It seems to have doubling on Liberty & In God We Trust.. Aside from that the P mint mark it there but hard to see... On the back the building to the right is faded yet the Windows looks doubled.. & UNUM also seems off... Can anybody help me out & tell me what exactly it is that I'm looking at? Please & thank you.

 

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Lets see a picture of the whole obv & rev.

could be an acid bath & MD

 

Severe die deterioration, typical for Philadelphia, sorry no added value.

 

Thanks.. Here are the other pictures

 

At best, die erosion.

 

Be on the look out for some nice die chips on these. They appear on the first set of windows on the main building. There is also a doubled die associated with this Philly coin. Check at www.doubleddie.com.