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<p>[QUOTE=&quot;panzerman, post: 8134083, member: 77704&quot;]We had a discussion about that subject in our last coin club meeting back in March 10th/2020....before the COVID came over from China.</p><p>We had invited&nbsp; some guest speakers, to debate the pros and cons of coin cleaning. Their analysis....professional conservation is great/ a must for coins recovered from ship wrecks/ buried in pots/ soil/ walls/ etc. For example the coins from SS-Central America wreck all where professionally restored/ without any damage to surfaces of the gold coins. So, when graded by NGC/ none had &quot;details&quot; cleaned.[/QUOTE]</p><p><br /></p>

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