Paul Daimler is the eldest son of Gottlieb Daimler and comes after his study and experiences in the German and Austrian group, that his father founded, and after discrepancies about future development in 1923 to Horch. There he after initial work on aircraft engines involved in the development of inline eight-cylinders.
This engine shall be an important element of the Horch brand, from now on beside Daimler and Maybach an obvious name as a provider in the luxury segment. The engine itself is according to this more tuned for comfort and minimal noise than to high performance. Herein is probably the sense of the two vertical shafts to be seen. In 1931 he invented even the hydraulic valve lifter, but at that time he has left Horch already three years ago.