Nice haul. Those HP generators were the standard in Comm/Nav shops in the Navy before the 8640 and the Wavetek modular stuff. Problem was, for stability, we left them on 24/7, to avoid drift. Wonderful generators once they have stabilized.
The Navy METCAL program procedure started out with "Step 1: Plug the TI power cord into a suitable power source and turn on TI using the power switch. Maintain power on condition for 24 hours before proceeding."
Interesting that yours has both the frangible "Calibration Void if seal broken" stickers, AND a "Calibration not required sticker" Go figure...
We had a bench set up just for the benchwarmers, like those and the USM-207 Nixie based Frequency/Period counters.
The SHF generator in the same series with a waveguide output was still in use in the early 2000s in some shops, for ILS receivers in the low-GHZ range. They too stayed on 24/7.
That 585 is a good scope - we used them with some funky plug-ins in the VAST shop in the 80s - nothing modern would do the trick, some kind of aberrant pulse modulation monitor, used only in a Vietnam-era groound track radar, similar to doppler navigation radar. Get you some 6DJ8s, the 6GH8s of Tektronix...
Cheers,