Hi Gerry,
It is an 8 tube chassis with a 4 pin speaker plug..most of the schematics I have found indicate a 5 pin speaker plug with very few models having a 4 pin speaker plug. The tubes are lined up in a single row and I have not found any chassis layout diagram similar to this. I only had time to verify the rectifier tube as an 80…I can look at the other tubes this weekend to see if I can make out any markings or tube numbers on them ( they are quite dirty ).
PH
