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<p>[QUOTE=&quot;GDJMSP, post: 2500180, member: 112&quot;]Yes, putty was one of the biggies. This is largely because putty, when freshly applied to gold coins, is at the best very difficult to see, even for some of the best. And it has fooled the graders at the TPGs many, many times. </p><p><br /></p><p>But putty is far from being the only thing that the sniffer can detect, in fact does detect. About the only thing it can&#039;t do is distinguish AT from NT. It can easily detect that the toning is there, it just can&#039;t tell AT from NT. But then that&#039;s because they are the same.[/QUOTE]</p><p><br /></p>

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