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<p>[QUOTE=&quot;Coinchemistry 2012, post: 2039405, member: 28107&quot;]If it is true toning on the piece, it is possible although it would be extremely rare, I won&#039;t deny it.&nbsp; The other possibility is that what we are seeing on that piece isn&#039;t toning but some sort of surface contaminant that has reacted.&nbsp; Maybe that is what the other poster was referring to with the surface deposits.&nbsp; My comments were meant more towards the pre-1933 range which is what I am more familiar with.[/QUOTE]</p><p><br /></p>

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