Interesting CRT site
 

http://members.chello.nl/~h.dijkstra19/page3.html

Check out the picture of RCA Color CRT from 1947, wonder if any of those still exist?

Thanks for the post - will have to add it to my links list next time I update my site.

There is a rumor that one was around a few years back, but it hasn't surfaced recently. There are several color tubes from 1950-52 still around:

http://www.earlytelevision.org/rca_developmental.html

I know of a screw-face Zenith version of the 15GP22... (in the hands of a collector; not for sale)

Charles