On older German postcards, a few times I've seen "6 Dess" or "6 Des" along with the publisher, series, etc. What does that mean ? Thanks.
This seems to be a sorting marker introduced by the publisher - They apparently subdivided their postcards into Serien and Dessins (from French), i.e. "series" and "designs" (subjects) in order to be able to more easily address a single card when ordered. So, it's basically a kind of order number.