Error??

[orange55]

I was going through a box of nickels and I found the weirdest thing it was this nickel with the edge like riveted out. I don't know if it is an error or damage that somebody did.

 

[OnARoll]

PMD

 

[enamel7]

Definitely damage.

 

[orange55]

How do you do something like this to a nickel?

 

[SilverForBrains]

it looks like someone made it into a cog