Nice John, I always wondered if those had a specific use or if they were just GP hole drillers.
Similar drills were sold into the 1970s for use by farmers and others who had to take the tools to the job in the field (often literally, such as when the tractor broke right in the middle of plowing). The name with which I'm most familiar is "Cole," and they were called just "Cole drills." I used to have a catalog from that period which offered the Cole drill and a range of handy accessories, like the v-block that automatically centered the drill on round stock (once you got it aligned). I wish I could send myself some money through a time machine - the prices were way, way lower than they currently go for as Kollektibles. (But then, that's true of many things. When I decided my life would be improved by ownership of a Stanley 90J bullnose plane, I paid two or three times what I could have spent back when they were in production.)
I imagine that, as gas-powered generators and, later, battery-powered cordless drills became cheaply available, they kind of stole the market from Cole. I don't know when production ceased.
Cole also made a really nifty vise that integrated with the drill, or could be used by itsownself, and attached to the bench by a block that also served as an anvil, or, again, hauled out to the field (although I'm not sure how you fastened it to things in the field).
I wouldn't walk barefoot across burning coals to get one - there aren't, actually, any tools for which I'd walk barefoot across burning coals - but I wouldn't leave one behind if I found it at the right price at a yard/estate sale.