These sets were either sold to the public, or have characteristics
that made it clear that the manufacturer had developed them to the point
where they could be sold.
Wickes color monitor ad from IRE Proceedings,
June 1954. Wickes ran ads for color encoder, vectorscope, bar
generator, stairstep generator, etc. about every month in the
IRE in 1954.
KOAM-TV Pittsburg/Joplin
MO about 1963. You'll see a Wickes color
monitor near the back.