I had some time to dive into the set and here's what I've discovered.
Overall the cabinet is in quite good condition in spite of the stains. I think I can dig up the correct knobs.
Peering inside reveal a torn speaker and what appears to be a replacement CRT.
I say that because the shield is not correct and it's help in with a zip tie.
Found a curious circuit drawn in the Sams. It looks the the HV supply was tinkered with.