Probably there would not be as many avid model train collectors today if they were still operated the same as when they were first made.
At that time, they were operated by a method called clockwork.
The model train would have a series of levers attached to it, and the train operator would have to use these to make the train stop and go.
If you were fortunate enough to have one of the more advanced models, then there was a level to make it back up as well.
Aside from this putting a bit of the damper on the fun of it all, the trains were well made.
Another drawback was they were large in size, but the good point of that was it was easy to grab the levers to work it.
Then ingenuity prevailed and some of the manufacturers started making parts that were fitted to the tracks.
These would automatically make the train function by stopping or reversing on its own.
These first trains relied on a three track system.
The electrical supply came from the center rail, while the two outer ones are where the wheels would work from.
If there wasn't a middle rail, then there were no power sources.
The big drawback being was they really didn't look very real.
However, the results were superb being as the trains at that time were constructed from metal, which is the perfect medium for conducting electricity.
We humans are always looking for something better, so the push came for more realistic designs, with accuracy being part of that demand.
Therefore, whatever manufacturer could supply the most details, benefited from the most sales during that era.