From the looks, the Umax is an S900
Yes I've checked everything out now and it has a single, 200 MHz 604e and a TwinView video card in it.
The case is interesting. It is a Palo Alto Products ATCX Convertible. This case was also used by Micron and Dell in various models, with their own Bezels.
I figured they used the same case manufacturer as it was very similar to one of the Dells I used as my Windows workstation at an old job 12-13 years ago. Thanks for all the information. The amount of mental notes you carry around is always surprising!
With the other machines, I've found the following:
ANS 700: 200 MHz 604e, 512 MB RAM, dual PSU, CD-ROM, DAT, 2x HDD
PM 7200/75: stock
PM 8500/120: MaxPowr 366MHz G3 upgrade
Blackbird Prototype (540c): 33MHz 68LC040, 16 MB RAM, active matrix LCD
Quicktake 150: has adapter, serial and zoom(?) lens in a case?
Color StyleWriter 2200
The universal monitor stand from the Mac II era (base is the same size as the Iicx/IIci)
Trash - the monitor I grabbed was a ColorSync 17" display. He had a 20"(?) early monitor but the case was cracking bad enough it was falling apart. Added to the fact that I still needed to get my kids back in the car, I left it where it lay.
EDIT: maybe someone can answer this but I read everywhere that AIX 4.1.5 is the last OS. He gave me an AIX 4.1.6 for ANS install disc. What's with that?