I almost have a '76 Zenith 19" space command CCII in my possession

[Jeffhs]

The remote hand unit shown likely is not the correct one for this TV, since the controller has a zoom button. I seriously doubt this set has zoom, as that was a feature of high-end Zenith consoles such as the Avanti series of the early 1970s (VK member Adam in Michigan has such a set, the model in the white pedestal cabinet). There also seems to be a button missing on the remote shown with your set, and the controller looks like it has seen a lot of use as there is a fair amount of wear (mostly paint worn off) around the buttons. This remote also looks as if it might use a garden-variety nine-volt battery, and not the obscure J battery used in some earlier Zenith electronic ultrasonic remotes. If this one uses a J battery, I will be very surprised, as by the mid-'70s I'm sure the design of these remotes had been modified to use the standard nine-volt transistor radio battery as a power source. Seems to me the J battery was used in Zenith's very early electronic ultrasonic remotes, made around the time the company was transitioning from the mechanical clickers to all-electronic ones.