1984 Quarter Error

I was wondering if this error was valid and If anyone could tell me more about the coin. Thank you for your time. <3 Tianna
P.S. Sorry about the quality of the pictures.

 

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Your pictures are good enough. That may have just been encased in a holder of some kind. If you can, let's see a picture of the edge.

 

no not an error. pmd from someone who was grinding down the edges, it looks like.

 

It is a damaged coin, not an error. For some reason someone ground down the rims.

 

Thanks to all for your input. The reason why some people deface coins are unknown to me. I still think it's interesting though.