Horst Bülm was an author and a Braun era Lectron System model designer.  His contribution was the model System 1200 (#8110030 –  149 DM) which explored switching (logic) algebra and Boolean algebra.  It first appeared in the 1970-APR-01 price list in the newly created Schülerübungssyteme product line. 

The System 1200 earned the IF World Design product design award in 1970.  According to the award selector, Mr. Franco Clivio, “Intelligent didactic design characterizes this learning system for understanding electronics. Unfortunately, it was met with very low market acceptance.”

Unfortunately, not much else of Herr Bülm’s life history is available or known as of this date (2021-JUN-19).