This is a d.c. motor with a gear box, its speed is
about 12 RPM under 6V.
For most automatic watches without wearing, about 500
rotations per day is required to keep it from stop;
Therefore, run the watch winder for about 40 minutes
However, some rotors of the watches only winding in
one direction, if you do not sure, you can run the watch
winder for about 30 minutes on each direction, total
The motor draw 0.025 A , 6V without load.
It is small but powerful, you can see the performance
Price : HK$ 48