Go to about the 20 minute mark and you'll see a 1980's Zenith hospital TV.
https://www.youtube.com/watch?v=IFYwO6i6RkI
I think Zenith used this same basic control layout for their hospital sets for years, starting with the 9-160 module, then the 9-186 module, and then the 9-470 module. Since this one has the dark tint CRT and newer Zenith logo, I feel like this one has the 9-470 module. After this series of TV's, they introduced those crappy "new horizons" and "health view" sets with the short-lived CRT's.
The last older Zenith hospital set that I saw in use locally was back around 2003 and it looked like either a 9-160 or 9-186 style set, with a very tired tube. It seems like as long as they'd show a picture, the hospitals kept running them (no matter how bad they looked).
Back in the mid '90's, I had one of the 9-470 versions of this set and I think it was from '90 or '91. Even though the set was only a few years old at the time, it's tube was already starting to get a little tired (that was also about the time when Zenith picture tube quality started to slide downhill).