No Obverse Quarter

I have a 2013 Fort McHenry quarter with a reverse but no obverse. It is the exact diameter of a normal quarter, but just a hair thinner. It does have its reeded edge. I have no scale to weigh it. It lays flat with the reverse side down. It doesn't lay flat with the obverse side down because the center is slightly raised on the obverse. The reverse seems normal. The obverse appears silver toward the center and cooper colored around the perimeter. Please see my pictures. I suspect that it's been altered and its not a mint error. Any thoughts?

 

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someone ground off the Washington side. looks like a dremel ground it off. maybe they used it as a button ?

 

Here's a penny I have with the same dremel type damage post mint...

 

for some unknown reason I think that looks pretty cool.

 

Yes.. It is PMD - Post Mint Damage
When you see the clad layer worn away and the copper core showing.. It's not a Mint Error