6-valve, 6- or 12-volt car radio. 5" permanent magnet speaker. Positive or negative earth.
Appears to be a Westco model 39 as seen in The Golden Age of Radio, page 84 (Westco manufactured a number of Golden Knight models).
Valves (6):
Frequency Bands: 1
Chassis Notes(most schematics can be clicked to download a full size version)