History of Rolling Stock
The British War Department up until 1916 relied on a variety of small four-wheeled and bogie mounted wagons. For the most part, they were too light to be locomotive-hauled. In 1916, a decision was made to fully develop a 60cm system. This involved the construction of several hundred locomotives and a couple of thousand wagons. The wagons all had three common features. The bodies ran upon a pair of bogies. The bogies were of two types. Most had steel channel side-frames and construction. Some early ones used wood side frames. Their capacity was ten tons.

The model available is of the steel framed type. In this picture, you can see the bogie mounted under a D-class wagon. There are more photos in the gallery.