I have found 4 letterheads from "Climaxwerk Gebr. Schmachtenberg".

The letterheads are from 1909, 1914 and two from 1915.

The list of their products at the top of the letterhead, do not include Schwert (Sword) or Dolch (Dagger) and I believe this is further evidence this company did not make swords or daggers.

I have never seen a Sword or Dagger with the "Gebr. Schmachtenberg" maker's mark.

They do list Jagdmesser.

Climaxwerk Gebr. Schmachtenberg 001.jpg (105.29 KB, 94 downloads)
Climaxwerk Gebr. Schmachtenberg, 1915 letterhead.