I don't know if this set has D.C. restoration, don't think so.
It looks too bright mostly because I had it cranked up to take the picture but as wvsaz mentioned it is impossible to get a black level to stay put on these sets.
Also this set uses a tinted safety screen that's not in place here, that would help the contrast somewhat.
That is the original CRT, a 17" 110 deg tube.
It was really tired and I rejuvenated it.
It works good for now but I have a NOS tube that will be installed when I'm done.
I checked all the tubes, it had about 7 weak ones including the 6AQ5 vertical output, installing a good one filled out the vertical and the picture is looking really good, the sound seems to work good too, at least on channel 3.
One tube was really stuck and I busted the tube socket getting it out
fortunantly I have an extra chassis for a parts donor.
Eric