Mint mistake?

I was wondering if this was a mistake made at the mint, or just damage received later

 

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Looks like a Real Clip Error !! Please a picture of the reverse .

 

It looks correct for a rounded edge clip error from the Mint !! Great find.

 

Yes Curved Clip
I want to share this wepage with you - http://www.error-ref.com/_curved_clips_/

 

You should see the Blakesley effect on the reverse opposite the clip .

http://dniewcollectors.blogspot.com/2012/04/blakesley-effect-on-clip-error-coins.html

 

you can see it slightly on the obv also

 

Here's the reverse

 

The Blakesley effect is a weakening of the design/strike at 180 degrees from the clip. Material tried to flow into the clip and that made the opposite side weak. Looks good to me, congratulations.