Apart form Ilse Kohl, the film's opening credits for costumes also include "Gebr. Mehringer" (= Mehringer Brothers). That phrase suggest that these brothers are not two or more costumers, but that this was the name of a family-owned company (a supplier or possibly a fashion store).
In the film's opening credits, the name of director Carl-Heinz Schroth is spelled without the hyphen.
In the film's opening credits, the names of both Fritz Stapenhorst and Ilse Wilken are listed together under the combined heading "directing assistance and editing". It is thus not entirely clear if they both were equally employed in both capacities, or if one (or both) of them were focusing more on one or the other of the two occupations.