Maybe it’s the Bavarian Pottenstein
Note that there is a senior and a junior Melchior Steiner (see the text). The factory was started by the uncle and continued with the nephew (knighted) according to the sources. It’s possible that there was some blade production in Pottenstein at a smaller level before the factory, but I’m not aware of this. The location seems to have been very good. It’s rare to find dated blades so it might be an artesenal example. Also not sure how exact the dating is as it was a long time ago now.