One of the first German propellers maker. The company was founded in Berlin by Karl Mohn, born 1887. At the age of 24 Karl acquired his pilots’ licence No. 188. The first reference of his propeller making company is dated back to 1915. According to Inter Allied Control Commision only 3800 props were maby by Karl Mohn and his son’s factory. Propeller production was terminated after WW. I.

Reference:
German Propeller Maker Part 3. Bob Gardner.