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Both of my Motorolas started out with 19VP22s, and both were retrofitted with 21AXP22s. Motorola sold a kit, including a new mask, etc etc. I've only seen one still to have the 19" CBS tube. I've also had two CBS-Columbia 360s; one with original 19VP22, the other had been converted. The conversion was unprofessional, so I don't know if CBS ever offered a factory upgrade or not.
Charles
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Collecting & restoring TVs in Los Angeles since age 10
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