It only has one extra gear for threading which is bolted on top of the gear below it which is a neat and handy idea.
I am having trouble finding any information on a 1911 model as far as how everything is supposed to work.
I don't yet know enough about what the different parts are called to even ask an intelligible question.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission