6-valve all-wave radio - also see model 3176 which appears similar / the same besides the cabinet. This could potentially mean Ariels coding for sets is:
model number, something? (1 speaker?, ), 7 for 1937, 6 for 6 valves? To be investigated...
Frequency Bands: 3
Chassis Notes(most schematics can be clicked to download a full size version)
Octal valves, approx 1937