The back is pushed in alot . I tried to get a comparison with a regular penny. Let me know what you think?
My guess is that its a "manmade" error judging from that thin line around the edge which tells me, two cent coins were ground down and glued or soldered together. Too bad your "Coin Shop" couldn't spot this.
see if it has a die rotation. that may have been the objective, if it is two coins soldered together.
I sent this coin with different pictures to Fred weinberg, and he said its hard to determine if its an error or damage. I'll post the pics that I sent him tonight, he did mention it's something he wouldn't buy with just looking at the pics but suggested ebay.