Hello Albrecht,
As I saw the photograph I thought it could have been a fire-brigade unit for
the "Deutsche Reichsbahn" and I am convinced for 90%, as in my opinion the
eagle is the decal for the "Deutsche Reichsbahn" trucks and the text upon the
door may say:
Werkfeuerwehr
Reichsbahnausbesserungswerk
I do not know what the exact difference would be for Austrian in contrary to
German fire-brigade uniforms, but what I see here is that there are less buttons
with the tunic. Normally there are more with the German fire-brigades uniform.
wilhelm