Space Command 1000?

[maxm]

A few weeks ago I bought a bunch of TV service manuals from a guy at a flea market who had a big box of them, almost all Zenith service manuals.

I was looking through a 1961 manual, and in the list of models, it lists one, the model F4000W as having a Space Command 1000. I had never heard of this before, and was wondering if it was a more advanced version of the 600? I assume it would have been ultrasonic back in 1961. It is only listed for one model, which has chassis 16F24Q/7F32/9F27.

Does anybody have or has seen a SC 1000 set (Doug?)