Tele-Beam B&W TV Projector

Hi! I’m hoping someone here might possibly have info on a Tele-Beam Model A 912 B&W TV Projector system. I recently pulled one out of storage that I put there back in the early 1980's, that I believe to have been in service prior to that since the 60's at a local school district. Just before it was stored it was actually tested and working. (Unfortunately, it was stored in a barn - although it appears to have survived reasonably well there for the past 25+ years, and is mostly just dirty, with some corrosion on the cables.)

Any info, either historical or technical, would be a great help - not only to put this into proper context, but just *maybe* even to see it operate once again.

The front panel of the tuner unit reads:
TELE-BEAM BY WALTHAM
WALTHAM PRECISION INSTRUMENT CO
BROOKFIELD CONN

The rear plate on both the tuner and the projector read:
TELE-BEAM BY KALART
MANUFACTURED BY
THE KALART CO INC PLAINVILLE CONN
MODEL A 912

I have searched the internet extensively, and other than seeing that Kalart in Plainville used to make AV equipment (but is now an abandoned, EPA monitored toxic lead cleanup site) and finding one reference to a Tele-Beam projector an a publication prepared for NASA in 1966, it’s pretty much devoid of detail on this item.

But this forum looks to be the authoritative place to exchange info on B&W, so if anyone knows, hopefully somebody here will. Any info/input would be deeply appreciated. Thanks!!!