Can you remove copper-nickel from copper, or....?

[COUNTRY GIRL]

I think some one very creative removed the outer layer of copper-nickel, but how? Maybe I'm wrong and it's an error? I can't imagine it floating around since 1979? Any thoughts?

I tried to get a better shot through a loupe, I hope it worked.

Thanks for the help!

 

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[VERMONTPACKRAT]

I will dare to say that you have a mint error there. Google missing clad layer or split before strike.

VPR

 

[COUNTRY GIRL]

I have a 50/50 on this one so far, error, removal of the nickle plate? I wish I knew for sure?