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<p>[QUOTE=&quot;GDJMSP, post: 297267, member: 112&quot;]At first glance I would have agreed with you Frank. But look at the pic again. The yellow arrow points to what would be called a cud, I agree. But what about the areas the red arrows point to ? They seem to me to be in higher relief than they normally would be, definitely higher than areas adjoining them. What caused that ? I have to wonder if it was not caused by heat which caused the copper layer to bubble because of the heated &amp; expanding zinc under it. Then of course there is the black coloration to think about, but that could have been caused by several things.</p><p><br /></p><p>Just ideas, I&#039;m trying to learn here as much as anybody else.[/QUOTE]</p><p><br /></p>

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