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<p>[QUOTE=&quot;mralexanderb, post: 682625, member: 7851&quot;]Before I put my .9999 pure gold buffalo proof coin into the safe deposit box I noticed a red spot on the obverse and one on the reverse. Now, that coin came from the mint in 2006 and has never left its airtite that it came in. I never opened it and always kept it in a safe with silica desiccants. I wish I&#039;d taken a photo of it because I want to see if it grows! The spot is more red than brown, and wasn&#039;t there when I bought it in &#039;06. I thought I had seen a thread on Buffalo gold toning but I haven&#039;t been able to find it with the search button. Does anyone remember that thread?</p><p>&nbsp;</p><p>Bruce[/QUOTE]</p><p><br /></p>

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