Holy Cow! What Motor is This?

But no gears to the wheel axle? Just a friction wheel?

Correct. No slipper clutch either - the mechanical piece that clicks when the train is stuck. The slip of the roller to wheel was all that allowed for jams. Inside the drive unit is also brass/metal gears.

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BTW Toy-Trains_Things...you are typing quite well one handed!

Iphone! You notice there are only a few links though. Links, images, etc are harder with one hand. Only 4 weeks to go.