https://www.metmuseum.org/art/collection/search/417028
https://www.metmuseum.org/art/collection/search/417010
https://2.bp.blogspot.com/_Rk6GBqQuP...frontuncut.jpg
https://robertedwardauctions.com/arc...r-stan-musials
https://robertedwardauctions.com/arc...ll-wrong-backs
The first two sheets are quite well documented.
I also have a group of 36 overprint back ones 1-3, 5 to 37 that I picked up. I think the 36 card layout of the sheets is pretty well confirmed.
Not many of the higher numbered series did survive though, so perhaps they could have changed to 72 card double sheets at some point, or re-printing certain cards over again on later sheets like Topps did with 1953, but the assumption has been that they were printed in sheets of 36, 7 of them.
It is pretty clear that the 12 PNOB and NOF cards are more scarce than their counterpart lower series cards as well if you check the population reports on PSA and SGC.