Hi BT
Your description of the problem indicates a disengagement between the line advance ratchet and the platen. There is a button in the center of the left hand platen knob. See if this button will pull out to engage the ratchet to the platen. Later models of the Super-Speed had a spring-loaded line-finder button which had to be held in when adjusting the page position for correct alignment of type. It is possible that earlier models of the Super-Speed had a line-finder function that could be left unlocked and manually locked once the page position was correct. Hope this points you in the right direction,
Sky
We humans go through many computers in our lives, but in their lives, typewriters go through many of us.
In that way, they’re like violins, like ancestral swords. So I use mine with honor and treat them with respect.
I try to leave them in better condition than I met them. I am not their first user, nor will I be their last.
Frederic S. Durbin. (Typewriter mania and the modern writer)