Whoa, if that’s all three rail that’s probably pre-war trains that were built on a large scale that’s roughly 2 to 3 times the size of the HO scale common now.

When I was a kid the oldest members of my extended family had them and would build their kits at Christmas as part of decorations, and they were so much bigger than the HO stuff I had at home.

It sounds like O scale equipment is similarly sized and has made a bit of a comeback but with a disconnect between countries. Based on a cursory check it seems crazy expensive.