Posted By:
Marc S.Jim-
Interesting results, although not altogether unsurprising.
What would be interesting to look at, I think, would be a comparison of # of SGC-graded examples versus PSA-graded examples for some of the other pre-war sets. I think money dictates PSA for the five sets you mentioned - but it seems like there are a number of other pre-war sets where there seems to be more parity in number of graded examples between PSA and SGC.