Erector Set, Gilbert or Similar Motor.
Tested and runs well from 0 to 12 volts DC.
Runs smoothly in both directions. 
Slower speed motor, from 0 to about 1,000 rpms is my best guess.
It has a worm gear on one end and a smooth shaft on the other end.
The shafts stick out about 3/4" on both ends with the smooth shaft being a bit longer.
The smooth shaft diameter is about 5mm.
It has a white plastic cover with 4 mounting holes.
The wires are in good condition with quick disconnects on the ends.
No factory box.
If you have any other info on this motor please let me know so I can correctly list it.
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