Railex Z Tristan Class C II Royal Bavarian Railways in green and black.

None powered.

Fine, fully functioning valve gear and side rods / drive rods.
Handcrafted in brass, in very limited production.

Please see picture, including Railex box, the box has the wrong locomotive description "Class B) 

 Ghost cars or powered cars was produced to push the loco and cars 
forward on the track.
Out of production for a long time, a rare collectors item. Produced in Stuttgart, Germany.