Has this car been featured before? I can't find it with the info I have it. So I don't know the mechanical base, but I know the coachbuilder.
This bodywork was proposed as universal to fit various chassis. The car itself was built on a DKW chassis, as can be seen on the hubcaps.
Solved here: https://www.autopuzzles.com/forum/the-black-hole/enigma-variations-(postwar-edition)/msg470267/#msg470267