OK, a bit more background information.
Apparently, DUX in one form or another was in business from the early 1900's until 1928.
Like a large number of German marques of the time, the Great Depression had a terrible effect on the company. They went through a series of mergers and alliances with other manufacturers including Presto/Magirus/Vomag, forming DAK which seems to have evolved into NAG which in turn was eventually taken over by Buessing NAG.
During their truck building days, they built 5 different chassis ranging from 1.000 to 5.000 kilo capacity.
Bill