All I can say is WOW!! that is jumbo sized!
Is that a 24" Metal/Glass tube??
It kinda looks like a Dumont from the screen and knob layout, it looks a lot like the Royal Sovereign?
http://www.earlytelevision.org/dumontra118.html
(Get a load of the guy in the third picture down, you had to wear a tie to build CRT's?
)
Can you post some inside pics??
Eric