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<p>[QUOTE=&quot;GDJMSP, post: 3613218, member: 112&quot;]In a way there already is. Things like length, width, depth - they all vary depending on which coin is affected - the smaller the coin, the smaller the scratch has to be. The bigger the coin, the bigger the scratch. Then ya have to throw in location for consideration, is it in a prime focal area, a secondary, a tertiary, and even those vary from coin to coin. On some it&#039;s in the fields, others the devices. Even obverse and reverse make a difference. </p><p><br /></p><p>An experienced grader knows all of this, but few collectors do it seems. And it is my belief that it is their lack of knowledge that usually makes them question, or not question, what the TPGs do and don&#039;t do. </p><p><br /></p><p>And of course the opposite is also true. For when one does know all of that, it also makes one question what the TPGs do and don&#039;t do.</p><p><br /></p><p>But are there actual defined physical measurements ? No, there isn&#039;t. But that&#039;s largely because unless one has very sophisticated instruments, measuring width and depth is all but physically impossible. Sure length can physically measured fairly easily, the others not. And the same kind of thing applies to any physical damage done to a coin. And that&#039;s why determination is left to experience, not physical measurements.[/QUOTE]</p><p><br /></p>

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