I think it is one-off:
a 1914 Brennabor 5/15 PS Sport-Zweisitzer
with an aftermarket 1923 body, made by Wendler / Reutlingen.
It was built by Wendler´s head designer, Helmut Schwandner, as his own ride.
Yes, the company existed until 1947
Then one of us must be wrong, because Wendler has produced special bodywork for cars at least until 1963...