Originally Posted by Kevin Kuehn (Post 3204330)

Actually there's quite a few with a single magnet on the side that have two sets of bars extending to clamp around the neck. If I'm not mistaken those would qualify as a double field. I'll see if I can find textbook examples of the two types. Can you see the type number on the neck of the CRT in your TV?

Originally Posted by dieseljeep (Post 3204337)

Looking through the pictures, it looks like a 12UP4 metal cone CRT. :scratch2:

Originally Posted by Kevin Kuehn (Post 3204351)

I can't tell. All the pictures seem to be from the front and the green Zenith mask is covering the edges of the CRT.

Originally Posted by dieseljeep (Post 3204361)

Every 12" Zenith I've seen used a metal cone CRT! The 10" model used a 10BP4 glass tube.
It's been probably 50 years since I worked on one of those.
The Sams would probably show the top view of the chassis and the CRT.