[Paul Philco322]

I have read that Delco was headquartered in Detroit in the GM Building, however manufacturing was done at a plant in Kokomo IN. Some sets were made by other makers, RCA one of them. I have a Delco 1212 and it has an internal antenna eerily similar to an RCA 35X, also uses the same wooden bumpers between antenna and chassis, and has the same knobs as some of my RCA's. So that may be your answer. RCA.

My 1212 is a fine player like most of my other 6 tube RCA sets. Maybe have you tried comparing schematics to a similar RCA from that model year or so?

Good luck,

Paul