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<p>[QUOTE=&quot;robec, post: 7892424, member: 19094&quot;]15-20 years ago I had a coin with nice color I sent to NCS for conservation. I can’t remember what the coin was, but was the size of a dime and was from the 1840-50 time period. </p><p><br /></p><p>I had previously showed it to a couple collectors who suggested it may have been treated with Deller’s Darkener to cover some distraction. </p><p><br /></p><p>The conservation process completely erased the toning, which was a nice amber color (light in the center and darker toward the rim). Under all the toning was a scratch that could now be seen. </p><p><br /></p><p>It might be possible your coin was treated with something similar. I had other toned coins that were sent in around the same time. This dime size coin was the only one to lose its toning or color.[/QUOTE]</p><p><br /></p>

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