[Arran]

No trouble at all, I had to look up what I may have had on a U.S made General Electric model (as opposed to Canadian General Electric) and thought I would look up Gilfillan Brothers at the same time since the Riders listing are in alphabetical order anyhow. I have a pair of Gilfillan sets but they are both your typical post war AC/DC radios, basically with the same circuit, but with different dials and cabinets. That weird tube lineup made me curious, I would guess that the 2.5 volt tubes are in series, but the 6.3 volt ones are not, sometimes radio manufacturers would cobble things like that together to get around parts shortages, or use up surplus parts, Philco was notorious for doing things like this both in the U.S and Canada, they even built a few sets around surplus car radios after the U.S halted car production, one using a Ford radio, the other a MoPar (Chrysler) car radio.
Regards
Arran