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Remember that the old 25" tubes (from the 60s) actually measured 23" once installed in the set. (they measured 25" from the outer edge of the crt) I'd guess that the 23EGP22 would have measured more like 21".
I'd suspect that in '65 if they were using a '25' it would have been sourced from either RCA or maybe Sylvania; did anyone make the 23EGP aside from National Video? I know the Motorolas that used them were well known for a sort of pastel color.
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Bryan
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