I've been under the assumption that my example is a Varney; given the fact that several parts are stamped/cast with that name. However...
...Don's post from 7/1 shows the All Nation 5/8" stack motor (made by Pittman), used on "...the Diesel Switcher, Atlantic and Ten Wheeler locomotives":
I thought that was the motor mine has:
...except I just measured mine, and it is the full 1" stack motor; no wonder it sticks out the back of the cab so far! But in any case, it is an All Nation/Pittman. So I suppose after All Nation took over the Varney line, parts from both makers could have been thrown into the same kit box...
Also, my instruction sheet (dated 12/14/46) shows a field-wound (?) motor:
...and shows how to wire a "reversing switch" for that type of motor.
One wonders went the change over to the permanent magnet motor took place; any guesses?
Mark in Oregon
PS: If anyone has a decent 5/8" stack motor they'd like to get rid of, please let me know. I'd like to try one on this model...