Conrac monitor model RHB19

[zenith2134]

So I have this heavy old studio monitor from October 1975 which still works really well. A search on the net turns up nothing about this model. It's got all the bells and whistles a crt monitor can have, very high quality and tons of controls. The convergence is on a panel on the top of the front of the unit which made a touch up of the corners real easy .
I have a feeling this was once a well known monitor but I'm not sure.
Right now using external sync on composite via an adapter plug and the pic is very good. Has an underscan feature too .

Inside the entire unit is on three slide out modules- high voltage, horizontal, and chroma.

Tried contacting Conrac Corporation weeks ago and never heard back. So much for supporting their legacy products (you suck)