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<p>[QUOTE=&quot;dougsmit, post: 3297141, member: 19463&quot;]I don&#039;t think there is a single answer. It would be necessary to look at each coin and decide what is best to be done.&nbsp; This coin looks a bit overcleaned or too harshly cleaned. Almost all ancients will require at least some cleaning but not all will require the same type or amount of &#039;processing&#039;.</p><p><br /></p><p>Valerian is from the time of the worst billon alloy and some of his coins simply will not look great no matter what you do. Earlier coins had a little more silver and look better.&nbsp; Coins later than his had less silver but look better because the copper looks healthier without that amount of silver.&nbsp; Bad things happen when you bury billon in soil for so many centuries.&nbsp; We see a lot of later Valerian coins that look like yours and that is not good.[/QUOTE]</p><p><br /></p>

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