Keeping the thread going, here are a few others I have that I never can remember their models designations? Of course I know the '28 Quad! The apple of my collection at the moment.
The first little motor I got from Jim Ross in a trade. I was thinking it is a 401, maybe?
The next motor I'm not sure of at all, but I show the serial number. Twin opposed. Sorry no front pic, but they are up against a wall.
The last one is my Quad.
Pics of the gearcase of the twin & Quad.
Proud to have these nice motors.
Dan in TN