The Leopold was a World War II German rail-mounted naval gun. The model is 1/25 scale, about four feet long. Each railcar is about 15 inches long. It's a work in progress; I haven't finished it and it has been sitting idle for some time, mostly because I have no room to display it.
The wooden decking on the railcars is basswood, railings are plastic rod, there are piano wire details, and everything else is paper. The kit parts come pre-colored, so I just have to color the cut edges and touch up here and there.