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<p>[QUOTE=&quot;-jeffB, post: 1249333, member: 27832&quot;]This is largely due to the copper in the alloy, which is more subject to chemical activity, right?</p><p><br /></p><p>I received this morning a Liberty set with the $5 gold, and there&#039;s a pronounced red spot right in the middle of the wing. Darkest one I&#039;ve seen so far. I&#039;m not complaining, as I got the set for well below the melt value of the gold, but I&#039;m still a little surprised the manufacturing process allows that kind of nonuniformity in the alloy.[/QUOTE]</p><p><br /></p>

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