Admiral 30A14 scored

[bandersen]

Originally Posted by Komet

Oh, I've never seen anything like this before! Are normal on B / W round screen? Can you post a detailed photo? Many thanks in advance

Yes, the 10BP4 and 12LP4 CRTs commonly used in early B&W television used dual ion trap magnets. Here's a closeup of a 12LP4 from another set.
Note that it would not normally be that far down on the neck. I loosened it and let it slide down while I worked on the set.