[Arran]

I can't see most of the resistors, but the ones I can see look like replacement carbon comp ones by the way the leads are dressed, there are metal oxide ones that are brown, so they don't look out of place. I can't remember what style of resistors were used in the two 1937 models, but I don't think they had dogbone style ones . I usually restuff paper caps because I can't stand the way the yellow plastic ones look in a pre war radio, more so then keeping it all original, replacement resistors don't bother me as much unless they are bright blue. some were replacements it was probably the audio coupling caps like the one on the volume control, and the one between the plate of the 1st audio, and the grid of the power output tube. The most obvious replacements are the axial lead filter caps under the chassis electrically replacing the cans on top.
Regards
Arran