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True 1953 NTSC Color?
Here's what I think. Until I see an engineering drawing (vintage, of course) with phosphor types specifically spelled out, all I know for sure is that the 15GP22 had it.
Rumor has it that the 21AXP22 had it but that the 21AXP22A didn't. Who knows for sure?
Purist? Maybe.
Pete
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