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<p>[QUOTE=&quot;GDJMSP, post: 4802523, member: 112&quot;]Fair enough, but the discussion, and the question asked, isn&#039;t and wasn&#039;t about the extremes and or, how shall I say it - &quot;other possibilities&quot; such as fluorine, chlorine, and or bromine. And there are more beyond those, such as what you suggest.</p><p><br /></p><p>The discussion/question is and was about what the collectors, ordinary people face, and if oxygen plays a key part in coins toning. And the simple answer is, under ordinary circumstances, cut off the oxygen and it pretty much aint gonna happen.[/QUOTE]</p><p><br /></p>

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