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Planchette Flaw or Not?


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It looks to be a combination of lamination and delamination. Lamination errors are planchet errors in which the surface of a coin cracks and flakes. It is generally believed that lamination errors are caused by contaminants in the alloy that cause the metal to separate along the horizontal plane. Lamination errors can develop before or after the strike. Delaminations are caused when the cracked areas split apart and some material flakes off.

Here I show you an extreme attached lamination


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