the Stoeckel lexicon lists:
Doll Franz, Bruchsal, Baden/Germany, ca. 1760
Doll (no first name), Bruchsal, Baden/Germany, ca. 1850 (I doubt this is the same Franz).

That's all I have.

To me this looks like family gunmaking business over several generations.
I doubt that there was significant retailing before 1800.

fuhrmann