There's a lot of stuff there that's familiar, straight from V7.
But yes, there's also a lot of stuff that's unique to USG Unix of the time.
As a non-insider, here's what I see that's unfamiliar:
In Volume 1:
- -mv macros for viewgraphs and slides
- the *full* C reference manual (oopsie!) without the "late K&R" addendum
- make(1) with E.G. Bradford's changes
- the sdb(1) debugger
In Volume 2:
- an SCCS front end (not the same as the BSD one)
- a bunch of graphics commands
- ged(1g), a graphics editor
- stat, tools for analyzing data
- vpm, the Virtual Protocol Machine for outboard comms
- Unix RJE
- Stand-Alone I/O Library for bare-metal programs
- Equipment Test Package