Weird TV

[Steve D.]

Cork,

You may know that Motorola produced the bulk of the 19" color sets in the mid-fifties. I believe CBS Columbia was next. Hoffman made a few and I have a rare 19" Capehart with the 19VP22. Check my web page.
I know Motorola offered a 21" conversion kit for their 19" sets. The tube base is the same and should be a direct swap. The mounting hardware and mask as you point out, are the challenge. If the 21AXP22A in one of the CTC 5's are good, you can certainly use it in the CBS set. and perhaps adapt the 21AX mounting hardware. Also a 21CY or 21FB will work.
Interesting project.