1920's hill climber toy train, original .

I got this as a Christmas gift a few years ago. This is a real hill climber toy train, this one still works, in all original condition,
they call this a hill climber, because when you push it, the train goes up hill or down hill, there's a weight that keeps the train going even up hill, hints the name.

often these's toys don't work anymore.
The only thing is the front two wheels are missing on my train.
The train and tender are one, the train is about 20 inches long.
and about 4 inches high.
made somewhere between the 1900's and the 1920's