[Arran]

Which capacitors do not have a manufacturer's name on them? Do you mean some of the paper capacitors do not? If you mean the one with the bright yellow labels that say "Type 484" etc., those are Canadian Aerovox capacitors.

OK, good to know, thanks. Yes, those are the ones I meant. One of them, a 0.25 uF Type 684, does have the Aerovox logo on it. But the others have no manufacturer's name on them.

Ron;
  I don't know if the U.S made Aerovox caps have those "Type" numbers, but I noticed it seems to apply to the voltage rating. "Type 484" means a 400 vdc cap, "Type 684" refers to a 600 vdc cap. I don't know why they don't have an Aerovox logo on them, but I have seen those kind before and am 100% certain that they are Aerovox since the Aerovox branded ones use the same codes, font, and bright yellow shells. Some of the newer ones have date codes like 3/47 marked on them, if this pre war radio has Aerovox caps with date codes then they are replacement caps, not only because of the date itself but because they started dating them in 1947, I've never seen anything older marked on them.
Regards
Arran