It uses old battery-powered 7-Pin British valves, popular during the mid to late 30s before widespread use of octal types.
Arrayed along the top is its set of plug-in coils. There are 10-wavebands, Range 8 coils are in place on the chassis, but maybe the Range 4 set is missing?
The set is built into a wooden case fitted to rubber shock mounts. As can be seen below the top section hinges upwards for coil-changing.


I'll take a better photo soon.
This shows an early crystal detector, above the Reaction control.