Yes, I am aware. However even your last reference lists them as Schnitzler&Kirschbaum (imo both of whom were agents, not makers/smiths), and not listed as K&S aside from that one source.
At any rate, have you any reference books listing Helvig at all?
I have only Bezdek, Wagner and the various fora for German marks, let alone much regarding Alsace.
Cheers
GC
|