This is a little different. These two items protrude through the rear panel as adjusters. The lower one looks like it would lever the core (?) up and down. The upper one terminates in something like a switch at the base of the coil. If these are HV adjusters, it's a new type to me.
Today's puzzle: I see this little empty socket near the 3rd IF section. Wonder what goes here?
There are no empty sockets elsewhere on the chassis, so presumably it's for some plug-in component, not a cable. Underneath, one terminal of the socket goes to ground and the other two are wired to a little network of resistors and (peaking?) coils that go to the 3rd IF stage and (through the big pink .1 cap) to the video amp.
The TV has loud and clear audio and the sound takeoff appears to be from pin 5 of the video amp, so presumably a signal is getting to that tube with nothing plugged into the mystery socket.
I don't know why you'd have a plug-in component here unless it's something optional or variable. Could this be some kind of local/distance thingie plugged in by the dealer in certain locales?
Phil Nelson