I have a very similar one, which I judged to be a B&S although the medallion is missing, as is the direct dividing plate, and the tailstock. I have stripped it, washed may years of sludge out of it, and rebuilt it. It is a superb bit of kit, also a compound with the gearing, I could find out very little about it. Again it is older than that one you have. Here it is, modeled by my daughter, Emily