Bill,
I remember the first one of these I saw. It was in a motorhome called the 'Explorer' and was sold through Pontiac dealers back in the early seventies.
I'll let you imagine what the monitor looked like.
It was a 15" black & white TV mounted on the dash of the cockpit.
Wow, now it seems funny but back then it was Star Trek stuff.
Oh, and the camera was about the size of a shoe box.
Tom