[Arran]

The second If transformer is that coil, mounted sideways, on top of the chassis, it is a superhet just a cheap one, the third section in the tuning capacitor is either unused or used for a preselector circuit, not for a tuned RF amplifier stage, I have a Sears Silvertone set like this. If it has a preselector circuit this may explain why they decided to use a second IF transformer with no can and only one trimmer, although it does seem silly to do that. It isn't an RCA, I don't know what it is exactly, it has a control layout similar to some Belmont radios, but more then likely it was made by one of the independent radio manufacturers in the Chicago area.
Regards
Arran