I think it could be an Austrian W.A.F., made by the Wiener Automobil-Fabrik in Vienna (obviously!).
I'm not sure of the model. The picture below is the only one I have, and has some similarities. It is captioned "1925 W.A.F. 15/45 PS straight-8 tourer", but I think that may be wrong. There was a 70-hp 6-cylinder model, so 45 for the 8-cylinder sounds too low. I don't know, though, as I have no other details.