That is MY Zenith! Been a while since I've seen that pic of my old garage.
It is one of the Chromacolor II series. IIRC it was made in 76'. I currently use it as my basement repair bench set...It has some intermittents in the video stages that cause me to occasionally slap it on the side to get it to behave it's self but it works well otherwise.
I won't be home for another 4 hours or so but I should be able to give you the model and more pictures then if you want.
If you find your self about halfway between Milwaukee and Madison Wi. with some cash(or my childhood Quasar shown in my want list linked in my signature) I could be persuaded to part with that set.
