Question about a Washington Quarter

I found this quarter, but am curious what is causing the inside edge, from about the 1 position to the 8 position to be beveled in on the inside of the edge (obverse). Can anyone explain this to me? I am used to seeing the edges pretty sharp where the edge was upset.

 

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Slightly miss aligned die strike. A very slight error coin.

 

Thanks.

 

The correct term is "rim".

 

Thanks, Hobo. I couldn't think of the right word, and it is something I need to commit to memory, seeing as how I like coins!

 

It is similar to the rim of a wheel.