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<p>[QUOTE=&quot;physics-fan3.14, post: 4404321, member: 19165&quot;]Much more likely, a substance was applied to the one side of that coin. </p><p><br /></p><p><br /></p><p><br /></p><p>To me, there&#039;s a big difference between your example and the ones in the PCGS slabs. Yours has color progressions that are all wrong, and has the appearance of a well-known (and very old) artificial toning process. The shades of blue and orange are characteristic of this toning technique. </p><p><br /></p><p>The two PCGS coins look correct, and natural. </p><p><br /></p><p>Here&#039;s a Bust Half I bought before I knew better, with very similar &quot;toning.&quot; I sold this piece many, many years ago but kept the pictures for education. </p><p><br /></p><p>[ATTACH=full]1106675[/ATTACH] [ATTACH=full]1106676[/ATTACH][/QUOTE]</p><p><br /></p>

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