Both appear to be from 1932....the thin stock may have been an extra printing that year, because Hubbell was the most popular player on the team.....so maybe they printed off extra cards because his card was the most in demand? Just a theory....but both the thick and thin stock are accepted, at least for the time being, as 32 issues. Per TCDB, both are 1932 issues.
Here is a little write up I found
https://www.sportscollectorsdaily.co...y-a-rare-find/
And here
https://prewarcards.com/2021/01/20/c...-fame-bargain/
There are just some cards for which prices are mind boggling...
Like the 39 Goudey Joe Gordon rookie card....or this 32 Hubbell. Although not a true rookie....that would be his almost impossible to find R315.....it's his second "card"/collectible.....and is literally a tiny fraction of his Goudey.
Grading companies accept both the thin and thick stock as 1932 issues.
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And I should note, even though the thin stock is more common than the thick stock issue, it is not as if it's common. It's still relatively on the scarcer side.....According to the current PSA pop report, PSA graded 11 of the thick stock and 13 of the thin stock. SGC graded one thick stock and 20 thin stock.......with a few additional raw examples floatings out there......you are still looking at a relatively scarce issue, in either stock.
I think it may not get as much love because it's a postcard/schedule.....sort of like the 84-85 Chicago Bulls Michael Jordan schedule....that schedule you can pick up for practically nothing, whereas as 86 Fleer card that came out a year later, well....you probably know