I have several Powerhouse drills, but mine were made by McGraw-Edison, apparently in the early 1970's. Mine have quite angular styling in cast-metal cases, not like this at all. The picture in the ad looks more like the Chicago-made drills by PET (Portable Electric Tools), SpeedWay, etc.
Rusty - I'm interested in learning more about Rotex - don't know them at all. Can you provide links, photos, info? There are several companies by that name, one making rock-boring drills; Festool uses the term for a sander; Dalbo-Rotex is a dental company; there are Rotex brake pads; another outfit makes turret punch equipment under then name, etc., etc. I know that there was a Rotex drill-powered hedge trimmer, but that's all.