The most frustrating radio I own...

[@toomanyinterests]

The spring holds down the bar that moves the switches so it doesn't come out of place. I guess 3 single pole switches must've been cheaper than one three pole and more wire. I've seen the long plastic finger used in some cassette decks for the power switch, to have it directly on the circuit board rather than mounted separately. The slug tuning this radio uses is called permeability tuning (had to look that one up) and is seen on a number of radios from this era. The advantages compared to capacitive tuning is that it is less bulky (my valve AM/FM radios have two separate variable capacitors which takes up a bit of space), cheaper, it's easy to switch band via different coils, and compared to variable capacitors which are subject to mechanical damage or vibration with their large inter-meshing plates, should be more durable. With this one though having a plastic screw thread, all it takes is some energetic tuning to put it out of action. The backwards speaker is weird, normally if a speaker can't fit on the front they get fitted to the side, I've seen one 1930's Philips radio with it mounted on the bottom of the radio, but the back? I suppose it's good if you use it in a shop, with the dial facing the clerk and the speaker out to the store.

[@Mikexception]

This radio could to be understood only by reverse engineering. Withiout schematic it may be not possible Also .I can't notice mains tansformer - watch out when touching chassis. Probably it is superheterodine because uses filters Adventage could be the price when sold - the rest I would judge only in fully working condition - withoiout schematic it will be tough.