Three tidbits of nomenclature for today's adventure into "The Rest of the Story"...
*Chromatic Optical Filter
*Video-matic tuning
*Magnalux
(Magnavox LOVES the words "automatic" and "automatically". Bear with me....)

The jury is still out on Chromatic Optical Filter. Just trust me, it's in there.....
Videomatic or Video-matic tuning:
"Video-matic fully automatic TV"
"Videomatic automatically assures you of the best picture, always, regardless of room light".
Magnalux:
"Magnalux Automatic TV Light Meter"
"Like a self-setting camera, this automatic TV light meter measures the room light and automatically adjusts the brightness and contrast- now you can enjoy the best picture always, night or day".
So, is the little red round sensor in the middle of the cabinet under the picture tube for the Magnalux system then?
I read three times before what I shared just now made any sense. Videomatic is included in the circuitry of the TV, just where we shall find out one of these days. Sure is a lot of "automatic" stuff on one of these TV's.