I restored one - a GE 805 model. Practically identical to the 800C
Not the easiest, not the hardest to restore.
Nice performing TV.
There is a person by name of Thomas Albrecht who is very knowledgable
on these TVs and has some good information about them.
They clean up nicely.
You can find that missing knob by posting in the classified.
Here is my restoration thread:
http://antiqueradios.com/forums/view...p?f=3&t=189602
Good luck with the restoration.
Carl