I have a WG4600 but the picture is not great. There is some pretty good Pac/Ms Pac burn.
I also have a K7000 that I was able to revive with a new flyback, but a week or two later the yoke appeared to short (that's where the magic smoke came out) if you are willing to work on it some it may be revivable or may need a new yoke. Tube has Samurai Shodown burn, but I don't recall noticing it when the monitor was working.
I also have a couple 4900 chassis in unknown condition and a tube, but I couldn't get either board to do anything on that tube, so not sure if the tube is shot or both chassis are bad.