1971-P Kennedy 50c Error- Lamination?

Looks like some sort of foreign substance.

Thanks for the responses. I'm still inclined to believe that this is a lamination of the nickel clad layer. I did soak the coin in purified water and there was no indication that this was a stain. However, I will give the coin an acetone soak and then take some additional photos.

That was going to be my next question.
any chance of getting an image showing that step up (or down depending on your perspective)?

Thanks I'll have another look, just on my computer, zooming in is difficult. I'll check on my cell phone in a bit.

There seem to be other lamination discussions on this forum in the past, including this one. Seems to bear some similarities to your coin.

http://goccf.com/t/54730

The form it is, this it is not what you guys say Lamination (so wrong denomination).

This coin if incuse appear to be a peeled clad. If rise it is foreign material.

@ mb560600



1. MINT ERROR= human was involved in the mechanical processes and result of an error. By definition of an error.
2. If during the cladding = lamination (union of two different material by different procedures, here rolling) of the clad over the core a missing part of the clad nickel miss, will never have round shape. point three explain.
3. the cooper and the nickel are almost square on molecular structure. In fact the both are dual pyramidal. One is tetra and other is octa. So never can broke round.

So those explanations show you is not mint error, because no human was involve and the molecular structure do not follow the natural course,

Your coin has foreign material. I can see this. Under the apparently cupric color you can see the Ni.

Mint errors are very rare. This term is use more and more in the foolish marketing sites.