SEM DC Servo Motor Type MT30U4-42 Ferrite Brushed Max 3400 RPM
I have 3 of these available 2 have plugs one does not. I do not have a DC power supply to test run them.

This is surplus from a company that kept spare parts on the shelf for their equipment.

[Please Look at all the pictures they are part of the description] 

                                                                                             [B1-F1-R2-S2-3]