It is hard to see in the pix
I dont see any classic keystoning like from a bad yoke.
First try just NO signal on the TV & see if the screen is full
of snow.
BTW Most B&W Zeniths have what is called either a width or lin sleeve.
Its a thin sleeve between the yoke & CRT neck. Its for fine adj.
Lazy techs sometimes through it away to get a bit more width.
Set will run fine without it.
73 Zeno
LFOD !