Anyone know of a 1970s Broadcast Monitor? ~20"

[vintage.digi]

So, I have a Conrac CYB17 which is a great representative of the 50s/60s era broadcast monitors, and a Sony BVM-1900 which exemplifies the 80s era of broadcast monitors and the point at which the market became entirely dominated by Japanese companies.

What I have not ever seen in person, or ever available for sale, is a broadcast monitor from the 1970s. Not merely a commercial monitor with composite input from a VTR such as a Sony CVM, but a bona fide broadcast-grade monitor in line with those produced by RCA, Conrac, and the Sony BVM line.

I've seen a couple low-res photos of Conracs from the era. I've also seen Barcos in American movies from the 70s, despite being European monitors. Network is an example of a movie that I've seen recently that I'm certain had a Barco.

Has anyone seen anything like this in recent years? I would love to have a broadcast monitor from this era in my collection.