Hi Jim,
You are right. I foolishly looked at the low speed on the label and made the assumption that it was a shunt motor. I had missed the fact that it was a geared motor. Two of the wires will go to the brushes and two will go to the field coils. The field coils will probably have a lower resistance than the armature.With your multimeter identify the wires. Connect the wires that go to the brushes in series with the wires that go to the field coil and connect the two free ends to your 110 volt DC supply. (The polarity does not matter.) If you want to reverse the motor reverse the connections to either the field coils or the brushes. (But not both.) Thanks again Jim, The information I posted would have burned the motor out.
Les.