Let me introduce you the old electric cogwheel train of my city, Budapest. It is a Rowan system coach (which means the coach has only one axle, the other side is based on the engine...like truck+trailer) and a small engine made by Ganz in 1929.
Today it's a museum stock of the Budapest Transport Co. There are some minor chages in it's livery!
I hope I can post you the operatible modell soon!

(see below)