Thanks, I picked up another gem tonight that I likely overpaid a bit for but I couldn't pass it up. Will post a pic shortly.
I think the earlier start for JIM and ST is definitely a factor in the number of higher grade issues. When you consider that TOS & TTA started up when ST and JIM had been going for 60+ issues already you will definitely see a difference there. Also I'm sure that the early JIM and ST issues had fairly low print runs, as all comics in the 1950's late pre-code and early post-code era were feeling the effects of the comics implosion after the Senate hearings, etc.
Strange Tales continued intermittent publication after the 1957 Atlas implosion while JIM was basically shut down (one issue in mid-58) until it was re-started coincident with the initiation of Marvel Comics. It's possible they used old sales figures to plan the print runs of JIM and ST while acting optimistically with TOS and TTA, but I've never heard that or seen any figures.
Does that explain why I just got a Journey into mystery #48 graded and it came back a 6.5 dated 8/57 instead of dated 7/57? Did they reprint the same book two consecutive months and then take the year long break?
Is it the only double issue in the run?