I'd have to say it was an Antec SOHO case, it definitely looks like it. Plus the one pic I saw of the internal mobo tray has the QC stamp in the EXACT same spot, pretty much identical QC markings. That, coupled along with knowing how old it is, plus I know Doug sticks with certain brands. Not to mention it originally had an Antec True Power 385w PSU in it for the longest time. That PSU is still in use in the Athlon XP system I gave to friend.
Now the one that would really throw you a curve ball, would be trying to ID the mid tower case I had back when I had my Pentium MMX/Pentium2/Early Athlon Thunderbird build. That one I got around.....late 1995-early 1996. Internally the top part of the case looked almost exactly like the design that Lian Li still uses for it's mid tower cases, with the solid plate that swept back from the 5 1/4 drive bays to the back of the case. It only had one 3 1/2 in drive bay rack, that could fit the FDD and 3 HDD's. That was removable, and screwed on to a spot on the bottom of the larger drive bay rack. Had an exhaust fan mount behind where the cpu would be for 80/90mm fan, and a front intake fan spot that was the same size.
Externally it really resembled the PC-7plus classic series cases that they currently make. As far as the external drive bay, buttons, and indicator leds go it was exactly the same. The front vent for the intake fan was in the same spot as well, only difference being instead of being holes, it had horizontal slits. Plus that part of the front bezel was removable, and covered up a nylon mesh filter thing that went over the front intake port. Didn't have any front USB/Audio ports though, since that was before USB really started to catch on. Only major difference externally between it and their pc-7 series would be that the case shell was a single piece design instead of having 3 separate panels like most modern cases do. I kinda wish I still had it, might try and see if the person I gave it to still has it sitting around somewhere. That'd be another one that I think would be interesting to try and mod.