This is a miniature three wheeled car of typical Lutz Hielscher styling.
The boiler is a typical Hielscher glass flask, 25mm diameter x 35mm high, heated by a small solid fuel tablet tray. The steam is fed directly to the back of the port face of the standard Hielscher oscillating cylinder; 3mm bore x 7.5mm stroke.
The crankshaft has a 23mm diameter spoked flywheel and a friction drive to a second shaft. The second shaft has a belt drive directly to one of the rear wheels. The 60mm diameter wheel has pins around it's perifery to take the belt, rather than a pulley. The single front wheel is steerable with a tiller.
The burner tray is missing, but it is a common size with other Hielscher models that I have.