1946 Kodachrome data
I have a copy of Henry M. Lester's Photo-Lab-Index. Section 16 is Color Data.
Pages 16-4 through 16-10 have quite a lot of data on Kodachrome. Kodachrome and Kodachrome Type A were from "8mm and 16mm motion-picture films; 35mm and Bantam (828) rolls for miniature still cameras."
Kodachrome Professional Color Safety Film, Daylight Type and Kodachrome Professional Color Safety Film, Type B were available in "Sheet film in all standard sizes up to 11x14".
There is tons of information in this book. I hate to photocopy this and post all of this since it is copyrighted.