Here is an oddball you don't see very often

[radiotvnut]

I think that tube has it's deflection yoke and convergence/purity magnets bonded to the neck and adjusted at the factory. That was done so that the builder could drop the tube in and not have to perform convergence and purity set-up. I think those tubes came out around '74. That tube will probably respond to rejuvenation provided that you use a more modern CRT tester.