1988 5 cent Error

Can anyone tell me what kind of error this is?

Thanks for the help!

 

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I think that is called a rail-road rim....I think it is caused by the collar not being right when the coin was struck.

Somebody else will know better that I would.

Speedy

 

This is post-strike damage. The "partial collar" is adjacent to the obverse face, rather than the reverse face. This is impossible in a 1988 nickel, since inverted die installation didn't commence until about 1996 for nickels. The metal has been pushed up and over the date, which is impossible in a genuine striking error.