I have found this picture and I think it is the same car.
The photo description says: Bechem in the self-converted AFM Sportscar, rebodied in 1952, at the Schauinsland hillclimb of 1953.
The series chasis of this car is is AFM 50-5 . And its story: Ordered by Karl Gommann, debut Eifelrennen 1950 as F2. Badly damaged Grenzlandring 1950. Sold to Günther Bechem for 1951, rebuilt and converted into sports car 1952 converted to 1.5l engine capacity and reconverted to 2-litre capacity in 1953.
But this souce could be wrong because I have found other photo of the AFM 50-5 and the puzzle photo with the name AFM-Küchen probably with te chassi 50-4 ( I can´t undertand German). This second source tells that was driven by Hans Stuck.