Greg on X: "I've bought these to play around with in creating a digitally controlled analogue watch face. They are dual concentric shaft Lavet-type stepper motors. Primarily designed for dash instruments in
Electronics: Lavet type stepper motors - YouTube
Quartz_Clock_Control
Electromagnetism and the Lavet Motor - ppt video online download
Greg on X: "Here is a view inside once of the motors. Two coils enable you to rotate the motor in both directions, compared to the basic Lavet-style motor found in many
Smallest stepper motor (that one could buy) - Electrical Engineering Stack Exchange