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<p>[QUOTE=&quot;Tamaracian, post: 8314599, member: 23122&quot;][USER=116145]@MIGuy[/USER] there are a few things to consider:</p><p><br /></p><p>(1) the coin has a current NGC value of about $650; if you, or any other service other than NCS/NGC breaks it out to clean it--say using Acetone--you will loose that Grade/Cert and have to take your chances with whomever you may send it to in the future.</p><p><br /></p><p>BTW dipping it in what is usually used to remove tarnish from silver coins will not remove the greenish residue if it is indeed PVC, but it will remove or lighten some of the toning that is present, but not all of it.&nbsp; Why? There is some very dark toning in the recesses where there are dings from circulation, and around the protected areas of the Detail, and this concentrated, dark toning--oftentimes combined with crud from handling--is not going to be removed by a typical dip and rinse.</p><p>Also,&nbsp; if it is PVC residue (usually greenish) or any other residue that has been in place for a long time and <i>if removing it is successful</i>, you may find that the area that was covered is a different tone (usually lighter) and/or reflectivity, and can also disclose pitting that may be present that was hidden by that toning or residue.</p><p><br /></p><p>(2) suppose you don&#039;t want to risk breaking it out yourself and you decide to send it in to NCS/NGC for Conservation/re-Grading (same as Standard Tier Grading).&nbsp; The approximate cost to you would be $89 + 2-way shipping + Insurance.</p><p><br /></p><p>(3)&nbsp; you&#039;ve shown only the Obverse and not the full slab and as [USER=105571]@Publius2[/USER] remarked it was not likely slabbed with PVC residue showing, so one could speculate that it acquired the greenish tinge that you&#039;re observing during the time that it was slabbed.&nbsp; I don&#039;t see a heavy accumulation of &quot;that&quot; residue.&nbsp; For comparison purposes, the image below is from a Heritage Auction of an SLQ in 2005 that was in an original white ANACS Slab (Cleaned AU50 NET Grade) that also has green PVC residue at at least one place on the Reverse (Heritage almost always does a very thorough job of describing the coin in addition to what the Slab Label says):</p><p><br /></p><p>[ATTACH=full]1472131[/ATTACH] </p><p><br /></p><p>Heritage states in the Description &quot;...and a pinpoint speck of possible PVC residue is near the N in UNITED.&nbsp; Even with their IMO &quot;less-than-great&quot; photos back then, I can see the green residue (blobish) on the base of the Leg on the &#039;N&#039;, and also on the tip of curved descender of the &#039;Q&#039; in QUARTER.&nbsp; If you&#039;re a HA member, you can log in and expand the reverse image where those two areas are larger and the green color is more pronounced--that is, in my experience, PVC residue.&nbsp; <i>NOTE that the above coin had been cleaned so the fields show much more of a contrast with the purported PVC residue, and in your SLQ that contrast is much less, but I still don&#039;t think that you have an issue that needs to be addressed.</i>[/QUOTE]</p><p><br /></p>

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