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Posted By: John Spencer

Once during the Merkle era, I was invited into the SGC booth during a Ft. Washington show to see first-hand how they grade, at least on site. It seemed that they really had 3 main tools to evaluate authenticity, possible restoration and establish a grade; first, the eye and experience of the grader, next, a 25X microscope and finally a black light. Of course, their practices may have changed with new generations at the helm. As far as PSA and GAI are concerned, I really have nothing to contribute.