Looks very similar but the one I have is a "Steyer". Is that the same thing?
Svennn
Maybe
Found on the net: There seems to be some confusion regarding the name of these vehicles. It is an s.SP heavy railcar, or Schwerer SchienenPanzer (Literally "Heavy Rail Tank"). It has been referred to as a Draisine (which means hand trolley), or a PanzerSpähwagen (Tank reconnaissance car). While PanzerSpähwagen may seem appropriate, the name is commonly associated with Armored Cars (Sdkfz. 222, Sdkfz. 223, Sdkfz. 231, etc..)
The s.SP's were produced by Steyer in 1944 and 1945, for the Deutsche Reichsbahn. They weighed approximately 18 ton, with 20mm armor plate. They were powered by a air cooled 76-HP Steyer motor which was a bit inefficient to move such a heavy car (bad gas mileage). They could operate singly, but the Reichsbahn had envisioned them to be in a complete Armored Train.