I had a friend who had a similar Zenith, that channel knob brought back that memory. It wasn't a space command, but I made up for that because I'm a space cadet!

A while back I related the story about how Lionel (trains) supplied the channel changing mechanisms to some TV makers. This was based on the technologhy they used in their locomotive's "E-Units" (a solenoid activated revolving drum switch, which in their locomotives reversed direction of same).

Anthony