aap has it booting
it appears to be something between the documentation for V4 and V5
https://squoze.net/UNIX/v4/

--- quote from Matt Day email:

Correction: the commands present in Angelo's copy of the v4 tape include:
dd, diff, glob, lpr, msh, pwd, tee

Not present in Angelo's copy of the v4 tape: col, eqn, neqn, spell

Present in Fifth Edition: all of the above, according to
https://dspinellis.github.io/unix-history-man/man1.html

On Fri, Dec 19, 2025 at 9:28 PM Matt Day <[email protected]> wrote:

> Cool, thanks Angelo.. I got it running easily thanks to your efforts.
>
> At a glance it looks like Fifth Edition to me... all the files are
> timestamped June 10 - 12, 1974. Commands present include col, dd, diff,
> eqn, glob, lpr, msh, neqn, pwd, spell, and tee -- according to
> https://dspinellis.github.io/unix-history-man/man1.html those commands
> first appeared in Fifth Edition and were not present in Fourth.