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<p>[QUOTE=&quot;Tunakahuna13, post: 3926351, member: 108229&quot;]Looks like a cooper wash coin. Sometimes when they do final annealing they dont fully wash out the tank in which the coins are heated to 1000+ degrees. When this happens if the coins run through it last are bronze or at least copper cored, the leftover particulates from them settles during annealing of the new batch and bonds to the outside layer. It is called an improperly annealed planchet and/or sintered planchet as the same thing can also happen when impurities from the premint planchet production rise to the surface and uniformly cover the top side and edge only where they oxidize under the heat and turn red, green, black, tan, or some other colors are rarer as well. The key to eliminating this as the case is to verify if the mint luster is still evident. These are also quite valuable depending on the errors frequency that year. You can look up the old BLACK BEAUTY QUARTERS and see what I mean.[/QUOTE]</p><p><br /></p>

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