According to Richard Mahrholdt’s 1952 edition of WaffenLexicon für Jäger und Schützen Bruno Weiss (Weiß) was the proprieter of a Waffenfabrik in Goldlauter near Suhl.
Heer Der Neue Støckel list the following in Suhl:
J. H. Weiss (Weis) circa 1720-1740
Johann George Weiss (Weis) circa 1760-1780.
Stefan Weiss (Weis) Vienna, Austria 1762-1829, from Suhl, Meister there in 1808.
The relationship if any between Bruno and Fritz and the Weiss’ listed above is unknown at this time.
These images are courtesy-