First, it's on its second (or third?) CRT. That's a Calvideo replacement jug. There is a fungus and/or decomposition eating away at the deflection yoke plastic pieces. Not much you can do but leave it alone until you determine if the yoke's bad.
I've had nothing but crickets chirping when I try to find info on my Halo-lite as well. I suspect yours is very early 1950's, judging from the construction; my first tv was a similar model sans Halo-Lite. Somewhere, lost to the ages, I have a copy of Wallace's Telaides I bought for nostalgic reasons that may have this listed. Until I find it, try this Sams' Photofact:
https://www.samswebsite.com/en/photo.../samsid/285_14