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<p>[QUOTE=&quot;TheCrownCollector, post: 25389451, member: 160023&quot;]GDJMSP - thank you for your invaluable input. I did notice exactly what you note (the edges of the coin) and I suspect, though I am not certain, the coins suffers from both, a lot of PVC (PCGS certainly believe it&#039;s PVC though they may certainly be wrong) and perhaps some verdigris. </p><p><br /></p><p>I would never use Verdi-Care on this coin myself as I have neither the experience nor the knowledge of the product. I know improper use of Verdi-Care is a GREAT way to kill a coin. Given the extreme rarity and value of this coin (<a href="https://www.ngccoin.com/price-guide/world/italian-states-naples-120-grana-km-213-1791-cuid-1148176-duid-1487256" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.ngccoin.com/price-guide/world/italian-states-naples-120-grana-km-213-1791-cuid-1148176-duid-1487256" rel="nofollow">https://www.ngccoin.com/price-guide/world/italian-states-naples-120-grana-km-213-1791-cuid-1148176-duid-1487256</a>), I&#039;d avoid Verdi-Care at all costs. The reason I am strongly leaning towards Xylene/Toluene, is because I understand one is unlikely to damage a coin with those products (at least a silver one - I know how you feel about copper).</p><p><br /></p><p>As for my goals - I want to bring this gem back to life. It&#039;s dull and dead now. Would I slab it in the future? Sure, why not but that is not a consideration for the moment. I wholeheartedly believe that if this &quot;green&quot; is properly removed, this coin can grade in the high AU or perhaps better range. I urgently want to prevent any further damage (and I think the week long acetone bath should have accomplished that) and secondly after gently rubbing with a q-tip, I am able to see what&#039;s underneath the &quot;green&quot; and it&#039;s quite beautiful. The coin has luster and field reflectivity one would find in a prooflike coin. It doesn&#039;t look it now because of two reasons:</p><ol> <li>I can&#039;t capture it using my amateur skills and my phone </li> <li>the coin is still substantially covered with the &quot;green&quot;</li> </ol><p>Let me ask you this - if the green substance is verdigris - would it easily come off using a gentle rub of a qtip after an acetone bath? My understanding is that it would not. Whatever it is, the acetone softened it enough for it to come off relatively easy. This is why I&#039;m leaning towards PVC. It just seems the acetone is not a strong enough solvent.</p><p><br /></p><p>As for comments from ToughCoins and Idhair, thank you for your input but please understand you are comparing apples and oranges. You are looking at the original images taken professionally by the auction house and comparing them to my over-exposed images with bright white light beaming at the coin. I use this light to closely examine coin imperfections and when looking at them with such a light, even the slightest blemishes show up as craters. Hairlines not easily visible to the naked eye also readily appear. Here are a couple more images with natural lighting:</p><p>[ATTACH=full]1625877[/ATTACH] [ATTACH=full]1625878[/ATTACH][/QUOTE]</p><p><br /></p>

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