A guy brought this Zenith to my door this afternoon. He picks up used TV's and furniture and resells them; but, this one was too old for him (gooe)! It's a 25" Zenith Chromacolor II using the 25KC45 chassis. The date sticker is hard to read; but, it looks like this set was made in 1/79 in Mexico. I do know that the "K" line was the last vertical chassis. The set fires up; but the convergence is way off and the focus is bad. The best focus is obtained by rotating the focus control all the way to one end and the sharpness is still not acceptable. I suspect either a bad tripler or corroded CRT socket. The top of the cabinet has some bad places from something wet coming in contact with it. I'll either fix this and find some place to put it or I'll end up giving it to someone who will take care of it (as in, not using it until it dies and throwing it out).
I think the newest vertical chassis Zenith that I've seen was a 23" single knob tuned set from 11/79. Anyone have any confirmed newer sightings?