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#9
05-11-2018, 01:46 PM
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It's just an eyeball method, but I suspect trimming when I see a high-grade card swimming around in its holder, with huge gaps between the card and the inner holder ridges.
I was pretty amazed when I looked at some high grade 51B Mantles and compared them to a lower grade example in hand— let's just say the lower grade filled the holder, and the higher grades not so much. 
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