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<p>[QUOTE=&quot;alurid, post: 4204785, member: 81991&quot;]I also have some, and have seen many zinc coins.</p><p>I do notice a similarity between zinc coins and copper plated zinc cents that show lines on them, that most people call &quot;Linear Plating Blisters&quot;. </p><p>The creation of the Lines on a zinc coin must be produced by the rollers that flatten the metal strips to the correct thickness for planchets. A groove in the roller will leave a ridge in the metal. And these ridges can oxidize at a different rate than the rest of the planchet if there is ample time between the planchet being made, and the coin being struck. Once this process has started there is no reversal of it.</p><p>&nbsp; It is hard to believe that these line would still show after the planchet is struck. But they seem to show even after being plated and then struck.</p><p>An older zinc AU coins show this feature the best, as does an AU copper coin show it&#039;s Woody effect.[/QUOTE]</p><p><br /></p>

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