Here's the schematic for anyone interested. Found this in Riders vol 6, and more in vol 7. Also covered in Sams 127-7, but I don't have a copy.
Looks like a pretty conventional design to me with 3 IF stages.
They did economize a little with the use of a germanium detector diode. Also, one of the earliest sets to use a 6AV5 hor. output tube which came out in 1949. Notable because it does not have a plate cap.
Note you can click for a larger version.
