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<p>[QUOTE=&quot;mlov43, post: 2044871, member: 16729&quot;]Look at the chart above about surface preservation.&nbsp; It&#039;s over 50% of the &quot;calculation&quot; in grading an MS coin.</p><p><br /></p><p>Look again at this crappy coin from my original post...</p><p>[ATTACH=full]374228[/ATTACH] [ATTACH=full]374229[/ATTACH]</p><p><br /></p><p>Now look at this details-designated coin with &quot;Environmental Damage&quot;:</p><p><br /></p><p>[ATTACH=full]374230[/ATTACH]</p><p>[ATTACH=full]374231[/ATTACH] [ATTACH=full]374232[/ATTACH]</p><p><br /></p><p>Now, I know this isn&#039;t the same coin, but it IS a Korean copper coin.&nbsp; It&#039;s also not a PCGS-graded coin (it&#039;s NGC).</p><p><br /></p><p>How can a clearly corroded coin be graded MS-63, but this one gets &quot;UNC Details, Environmental Damage&quot;?</p><p><br /></p><p>So <b>brown spots of RUST only affect the Eye Appeal factor</b> of the grading equation, and <b>do not affect Surface Preservation</b>, or affect it very little?</p><p><br /></p><p>I would be nice if Physics Fan or Doug (GDJMSP) would respond to this question...[/QUOTE]</p><p><br /></p>

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