[Radioroslyn]

I would suspect that it would be a HB job. Back in the day the only thing you would have used it for would have been CW. SSB wasn't developed till the mid 1950's and not popular till the mid to late 1960's Defiantly a cutting edge technology in the '50s and mostly done/built by hams that where in to experimental design. Actually if you need a quick and dirty BFO it's pretty easy to run a small length of wire attached to the grid cap of the IF amp then a few quick turns around the glass portion of the tube till it oscillates.
Terry