This build is reviewed in Serbian computer magazine "Računari" ("Computers") in it's December 1991 edition, even though the build itself was probably compiled in June 1991.
According to the article, the build is officially labelled "Beta Release 1" (which confirms the assumption that build 34e is Beta 1 candidate) and comes on five 3.5"-1.44MB floppy disks. The rest of the article compares it to Windows 3.0 RTM, listing all the improvements over it (which were later included in the RTM of Windows 3.1).
In another article from that issue the build is described as having no more support for real mode, which justifies the lack of the sixth disk. Build 34e still has it, as it still includes real mode support, although it was already being phased out at that point.
