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<p>[QUOTE=&quot;Tom B, post: 1660078, member: 11854&quot;]If I recall correctly, the Sheldon scale was originally designed for early copper only and was more of an explicit <i>dollar grade </i> than today&#039;s implied <i>preservation grade. </i>&nbsp; That is, a VG8 was meant to be worth twice what a G4 was worth and only one-fifth what an EF40 was worth.&nbsp; </p><p><br /></p><p>Today, the Sheldon scale has been adapted to follow surface preservation and wear instead of tracking general value.&nbsp; It has also been greatly expanded in its everyday used grades and this is especially true for the MS grades.[/QUOTE]</p><p><br /></p>

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