Posted By:
MorrieNice pick-up.
In answer to your questions (no particular order), I think a 3-4 is probably reasonable (I lean more toward a 3, but it's a nice 3), and there shouldn't be much difference in who will give it the "best" grade. The companies that have looked at the bulk of the pre-war stuff are SGC and PSA, and if you're most concerned about future resale, the consensus seems to be to go with PSA. I actually like both the SGC and GAI slabs better than the PSA, and it seems like SGC has a better handle on the pre-war cards, so may be more accurate.
Not sure if it answers your questions, but hey - you asked.
Regardless, enjoy your card!
Morrie