Mostly unstamped quarter back

[Dredknot]

I found this quarter in my spare change cup. All I can tell is that it is a 2001 North Carolina. Could this be a mint error? It seems to be as thin as a dime. I am not into collecting coins but this peaked my curiousity. Does anyone have any Ideas about it?

[diamond]

The reverse face was removed by a lathe or milling machine. It's not an error.

[Dredknot]

Do you really think so? I thought the grain comming from the center of the coin looked almost seemless. Any how it gave me something to read about for the last couple of days.
Thanks for the info I thought I might of found something.

[Dredknot]

I looked it over more cloesley and there is a lip on the outer rim of the coin. I don,t know much about the minting proccess but I would assume the outer rim is pressed on. Which to me would mean they wouldnt of been able to press on the patter with the lip there.
Sorry I dont know the proper terminology.

Thanks again.

[foundinrolls]

This is often one of the phases in the creation of what we call "Magician's Coins". A coin is milled to fit inside a hollowed out piece made of another coin. As a novelty item two obverses or two reverses would be paired together.

This could be one half of a "magician's coin" or it could be someone simply playing around with some milling equipment as was suggested in other replies.