A Brief History of the Marque
Deutscher-Automobil-Konzern GmbH of Trödelring 4, Leipzig, 1923-1925.
DAK was a sales concern which represented car manufacturers Magirus Presto, Vomag and Dux.
An automobile manufacturer, DAK built lightweight motorcycles using JLO engines of 117cc and 147cc with belt drive and two speeds. The excursion of the carmaker into the motorcycle business ceased after two years due to unprofitability.
Sources: motorräder-aus-leipzig.de, Axel Oskar Mathieu Archive
N.B. DAK is also the acronym for Deutsches AfrikaKorps.