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<p>[QUOTE=&quot;HawkeEye, post: 3092306, member: 86305&quot;]Well I have never known where the error labels come from and I doubt it is the graders.&nbsp; I think it is likely a production error when the coin gets slabbed.</p><p><br /></p><p>As for error labels I also have a few and they are a nice rarity.&nbsp; But that is a matter of cost and timing.&nbsp; For example, I have a Stone Mountain DDO that when slabbed was not a recognized variety, so it was labeled with an E designation.&nbsp; Today it is a recognized variety and just get the DDO label.&nbsp; Same variety, different era.</p><p><br /></p><p>The accuracy of the TPG&#039;s and in particular PCGS is pretty amazing.&nbsp; I purchased 1,000 1881-O Morgans for a study and found only 2 mislabeled as 1881-S.&nbsp; I was also surprised that when you lined them all up side-by-side the grading accuracy is obvious and I think pretty amazing.&nbsp; There is a coin or two I might argue with, but not many.</p><p><br /></p><p>If I were going to do a study like yours I might find someone at the TPG&#039;s as a designated reviewer of your work to be sure explanations are factual.&nbsp; Some of my coins in rattler holders were done when there were fewer grades and that effects what we now think of as grade.</p><p><br /></p><p>But sounds like you are planning to do a lot of research and I wish you luck.[/QUOTE]</p><p><br /></p>

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