Got my first roundie today - an RCA GF631M, probably late 1964, 21FJP22 CRT. There's a TV shop that is closing in Virginia Beach, and I got the TV from them - 25 dollars. They even threw in a NOS degaussing Globar that was taped to the CRT face. The model tag in intact on the back. Haven't plugged it up yet. While there, I saw a professional studio photo of the same set - turns out some production company used it as a prop. I'm not sure what the production was - movie, TV or print, but I'll be looking. It's got the wrong legs - mine are squarish and they should be round.
I hauled away two other TV's in the same lot, a FREE
19" Setchell Carlson BW Console(ette?) and a luggable 19" Dumont BW portable for 5 dollars (I offered 10, he talked me down to 5).
So now I guess my 6BK4 quotient is at a "1" - funny thing is, short of a CRT or flyback, I have nearly every part for this set in NOS condition, just waitin' to be used...
Pics and update promised soon. Cheers!