Teletype motors]
183991 (no data given)
from the picture, this motor seems to have a centrifugal governor.
So it is eventually adjustable for 50/60 Hz.
It might even be a DC motor. I am pretty sure that Creed teleprinters,
etc were avaialve eith DC motors (often 24V), the military used them 'in
the field'.
The governor for the DC motor is odd. The motor is shunt-wound and the
governor _increases_ the field current when it's up to speed. That wil
slow down such a motor (yes, I know why, but it still seems odd the
first time you come across it).
-tony