I read German a little but I know that Erdmann Kircheis was a manufacturer of machine tools and industrial equipment from c.1860 to some time into the c20th, probably destroyed or disbanded as a result of WW II? Or amalgamated with other firms etc. Located as the advert shows in Aue, Saxony, it became part of the former DDR (East Germany) until German re-unification in 1990.
So the logo on the knife looks similar to the one in the advert hence it might have been made as an advert knife or presented to employees?
What evidence do you have that it was obtained in the 1930s? It may have nothing to do with military connexions and just be somebody's knife.
The makers Gebr. Hoppe are as we see a Solingen based firm, Germany's cutlery capital. There were other Hoppe in Solingen with various first names before WW2 so I would guess that this is an amalgamation of smaller firms under the 'brothers' title and this would be later. It's Rostfrei- stainless - and I think relatively uncommon before WW2, but it could be. Gebr.Hoppe made a lot of inexpensive knives particularly metal handled knives in turned stainless-similar to Richards in England from the 50s onwards. The knife itself appears to be a general Scout type multi tool that might have been favoured for outdoors, picnics etc.