Identification of Airline AM Radio?

[Winky Dink]

I took out the chassis but found no further clues. Went to RadioMuseum.org and found a dozen Montgomery Ward models from 1930 to 1932 with 8 tubes. Found several with the same type and number of tubes as my unknown chassis. Eliminated a couple that were identified as table models. Finally ended up just a couple of possibilities.
Went to NostalgiaAir for some Rider tube placement diagrams and found a match with two models--62-040 and 62-181. The chassis has "181" stamped on it. Voila! My presumptive ID is that I have a 1931 Airline Sovereign, model 62-181.

Is it more than coincidence that I also researched the history of Emmett Idaho and found that the town was electrified in 1906? But perhaps the lines didn't reach the home of Charles M. Buster until 1932.

Now I have to get a good copy of the service info. The Riders I have so far is not legible. Then I have to repair the cabinet veneer while the chassis is out. Then I have to find out how to...