[Radio Wrangler]

Any clues in where you found it?

Are those modern choc block terminals added inside on the left in the rear view? If so, it's something someone wanted to keep going in fairly recent times.

The style of the neon bulbs may be good for dating. The rest looks like it could be much earlier than the 1930s.

It proves that Spinal Tap weren't the first people to go up to eleven.

David