I don't see any doubling here but you do have a minor die clash in Bay # 3 of the Memorial, a minor error.
It matches all on the markers from what i see even Lincoln is doubled the n in unum u can see its the same n just terrible pictures
If you think that is the big one, not even close. As the person who discovered the variety I can guarantee that. Have you determined that this coin is even zinc? Richard
Yes its copper and i would like to know its worth its clearly a copper counterpart to the zinc one well that's at least what i think