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Black-Matrix
kc8adu, Yep, that tube should be a black-matrix. I can't remember how the numbering codes work, but when a replacement tube for the "old type" picture tubes had a V in it, it meant black-matrix. In our shop we used to install alot of black-matrix in the old RCA's that used a 25XP22, the replacements used to be a 23GV something...... (too many years ago for me to remember) A round matrix is pretty rare as the customer usually did not want to pay the extra $$$$$ on those sets. I just always liked the black-matric type because it usually was a HUGE improvement in the picture.
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