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<p>[QUOTE=&quot;GDJMSP, post: 1664304, member: 112&quot;]Without seeing them in hand I don&#039;t know. But let me put it you like this.</p><p><br /></p><p>1 - Copper is the most reactive of our coinage metals, at least our older coinage metals. If air can get to the copper coin, it is going to tone and rather quickly. That is a given. And once they tone they are no longer mint red.</p><p><br /></p><p>2 - Quality coin holders and proper storage methods that greatly slow down toning have only been in use for recent years. But let&#039;s stretch it and say they have been in use for say 50 years.</p><p><br /></p><p>3 - There are tens of thousands of mint red copper coins that are 100-150 years old in NGC and PCGS slabs that are designated as mint red.</p><p><br /></p><p>Do I really need to say anything else ?[/QUOTE]</p><p><br /></p>

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