It's blatantly obvious the the original yolk had a … problem and needed to be replaced, it seems to have failed rater violently, it's no wonder it did not take the CRT with it.
https://i.imgur.com/zzpbKHC.jpg
it says in the Sams to use the back of the original yolk with the centering magnets on the new yolk, which seems to be what was done, but it was so damaged, I do not think I can ever get it back on again.
The damn thing is melted to death!
I may be able to bodge some of the rings from my projector tubes on to it, don't know how well it will work , or somehow use the plastic from the projector assy with these old rusty rings, somehow...
who knows.