Hi Dan,
I have that same model as well, except it is an RCA of U.S. manufacture. I was missing a small knob when I bought it, and it took a few years to find one (on eBay). They seem to be quite scarce, as I’ve only seen that style of knobs on a couple of other sets, one being a Westinghouse, the other a CGE. Both were also of the 1932-33 model year. Both were also extreme Deco styling, along the lines of your 115. I’m not sure the styling was very popular…I like it, but the more “traditional” style models seemed to sell much better. Maybe it was also a price difference?
Brad