I spent a good amount of time cleaning the grime off of this set, knobs shine like new. Did this set originally have silver and gold knobs? The power and color knobs are silver, the tint knob is gold, Maybe one was replaced?
Only issue left is the cabinet. Someone went over it with a coat of stain at one time. They did a poor job and didn't wipe of the excess stain. So its a bit uneven. I may be able to buff it out with some patience.