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jsa and psa/dna difference of opinions?
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02-26-2016, 04:20 PM
drcy
David Ru.dd Cycl.eback
Join Date: Jul 2013
Posts: 3,473
To be honest, I don't know the methods PSA, SGC or Beckett use. I'm sure experience is most of it, along with looking more closely and technically at expensive cards and rare cards they are unfamiliar with.
I'm certain they don't do
carbon dating
.
Last edited by drcy; 02-26-2016 at
04:28 PM
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