If the yoke and rings are separate then you can still use it in a vector monitor. It will work with an Amplifone or WG6100 yoke.
Ooh, you said ACB... that's a thin neck tube with yoke and rings as a single unit. If that's true it's likely 3/14 ohms and will work on any K7000 19" chassis but not vector. Don't toss it, that's a usable swap tube