RCA sometimes glued the yoke to the CRT, but they usually had a sticker saying that that was done. RCA also used a magnetic strip wrapped around the CRT neck, between the yoke and the CRT neck pins. At the factory, the convergence is adjusted by a machine that, once convergence is good, will "record" the required magnetic polarity and strength into this strip, like if it was a piece of tape from say a cassette. If the yoke part numbers are the same, I'd just keep the yoke, CRT and convergence adjustments together when you transplant the CRT into the other set.
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