Fred, yes, that is the speaker at the bottom of your last picture. I had a similar aftermarket radio in my 41 coupe when I bought it (didn't work). It mounted on the firewall above the steering column, just like the one in my 37. And yes, the speaker is inside of the radio in both of these.
I’ve bought several model 800 radios on eBay, some for as little as $10. But they are heavy, and the shipping was between $15 to $19. I’ve had 2 or 3 of them repaired, which run around $80 for new capacitors and vibrator. I painted a couple of them up and sold them two friends who wanted a radio in the dash, but didn’t care if it worked or not.