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The "V" after the number designates viewable image area, not necessarily black matrix. This is a different issue than the "V" in the middle of a tube code (like 21GVP22). I believe the government required picture tubes to be measured in actual viewable area rather than total faceplate diagonal around 1973. Therefore one replacement for the 25XP22 would be the 23VALP22. A round color tube would be a "19V" as opposed to a "21". Black and white tubes also began to use the "V" measurement at this time. The "V" type tubes were probably more likely to be black matrix because they were more advanced in technology owing to their more modern dates of manufacture, but if you look in a tube manual you will see that they are not all black matrix.
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