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<p>[QUOTE="physics-fan3.14, post: 4501206, member: 19165"]Couple of points that I have to clear up here, Publius.</p><p><br /></p><p>The TPGS do not, have not, and will not ever practice technical grading. This is a common misconception. The TPGs have always practiced Market Grading. The Market Grade of a coin is an attempt to "value" the coin - its a ranking system where "this coin is more valuable than this other coin, and so it will get a higher number." This value may be based on technical aspects, such as strike and contact marks, but it is also heavily influenced by the subjective aspects such as eye appeal (toning, etc.). In reality, this is inherited from the fundamental basis of the Sheldon scale - a coin worth 70x the base price must be an MS-70! The idea of value as a means of rank/grade has been the basis for the grading system since before many of us were born.</p><p><br /></p><p>The TPGs MARKET grade coins, they don't TECHNICAL grade them.</p><p><br /></p><p>A technical grading system is something like the EAC grading scale. I'm not sure if you've ever looked into that, but the EAC scale is a true technical grading scale. Eye appeal is not a factor - surface preservation, marks, corrosion, etc are. Technical grading actually reduces the subjectivity in grading a considerable amount: Is there corrosion present? Deduct 5 points. Is there a mark on the cheek? Deduct 5 points. Its a set formula based on technical factors - not a wishy washy scale based on how much I like the flash of the luster or the color on the coin. (the interpretation may vary slightly between graders, but it is far more consistent than market grading)</p><p><br /></p><p>This distinction is very important, and commonly misunderstood.</p><p><br /></p><p><b>*A TPG is NOT "grading" a coin. They ARE assigning it a Value.*</b></p><p><b><br /></b></p><p>In a market grading scheme, "aesthetic judgements of a coin's desirability" (i.e., eye appeal) are central to the scheme. They haven't "crept" into the grading - its central to their mandate.</p><p><br /></p><p><br /></p><p>I think that [USER=24314]@Insider[/USER] and [USER=13813]@CaptHenway[/USER] might be able to illuminate these points a little more.[/QUOTE]</p><p><br /></p>
[QUOTE="physics-fan3.14, post: 4501206, member: 19165"]Couple of points that I have to clear up here, Publius. The TPGS do not, have not, and will not ever practice technical grading. This is a common misconception. The TPGs have always practiced Market Grading. The Market Grade of a coin is an attempt to "value" the coin - its a ranking system where "this coin is more valuable than this other coin, and so it will get a higher number." This value may be based on technical aspects, such as strike and contact marks, but it is also heavily influenced by the subjective aspects such as eye appeal (toning, etc.). In reality, this is inherited from the fundamental basis of the Sheldon scale - a coin worth 70x the base price must be an MS-70! The idea of value as a means of rank/grade has been the basis for the grading system since before many of us were born. The TPGs MARKET grade coins, they don't TECHNICAL grade them. A technical grading system is something like the EAC grading scale. I'm not sure if you've ever looked into that, but the EAC scale is a true technical grading scale. Eye appeal is not a factor - surface preservation, marks, corrosion, etc are. Technical grading actually reduces the subjectivity in grading a considerable amount: Is there corrosion present? Deduct 5 points. Is there a mark on the cheek? Deduct 5 points. Its a set formula based on technical factors - not a wishy washy scale based on how much I like the flash of the luster or the color on the coin. (the interpretation may vary slightly between graders, but it is far more consistent than market grading) This distinction is very important, and commonly misunderstood. [B]*A TPG is NOT "grading" a coin. They ARE assigning it a Value.* [/B] In a market grading scheme, "aesthetic judgements of a coin's desirability" (i.e., eye appeal) are central to the scheme. They haven't "crept" into the grading - its central to their mandate. I think that [USER=24314]@Insider[/USER] and [USER=13813]@CaptHenway[/USER] might be able to illuminate these points a little more.[/QUOTE]
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