Drögmöller it is! This particular car won the Concours d'élégance at the "Internationales Automobil-Turnier" in Baden-Baden in 1933. Shortly afterwards, Drögmöller quitted building car bodies and specialized in buses. In 1995 they were taken over by Volvo. In 2005 production was stopped.
Congratulations, Siata1. Another point for you.