port ewen ace
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Unlike other white-metal US coins, the modern nickel does not have a clad layer. It is a cupro-nickel alloy through and through.
No explanation for what you are or are not seeing, but it's not a lamination error in the normal sense.
Even the Cupro-Nickel planchets of Nickels suffer laminations and de-laminations of the metal on the surface of the coins. I have owned and sold many Nickels with these errors ...
...I do have an issue with the previous post. When any metal is rolled to a thinner state, some "layering" can occur. This is especially true if the metal being rolled is not annealed periodically during the process. When this happens, a separation of layers can occur that appears very similar to what we call a "lamination" error. I do have a few nicks that show this problem, but nothing that appears like that in the OP.
small piece flaked off near the mintmark. area behind portrait is nearly as high as the hair View attachment 1154323 View attachment 1154324 View attachment 1154325 this is not glue, tape or other foreign material, just blistering of outer layer of planchet