At the time you are referring to, 1850 to 1900, Schmiedeberg was far away from the eastern German border. There was no Poland, Warszawa was a provincial city of the Czarist Russian empire. AFAIK the Colletes, Victor, Leon and Leopold, were a Liege, Belgium gunmaking dynasty from 1836 to 1909, with outlets in Warszawa and other places.
The former gunmaking town Herzberg with gunmakers like Tanner, Crause, Ebbecke, Welkner, Störmer, Klawitter and others never was in eastern Germany, not even after WW2. There the Hanoverian Gewehrfabrik (arsenal) was founded by king George II of GB & Hanover in 1738. Polish names were unknown here then. When G.F.Störmer closed his doors in 1929, the gunmaking in Herzberg came to an end. In fact, I know the town quite well, as I am responsible for the forests surrounding it. There are/were other Herzbergs farther east, but not gunmaking ones.
Mechanization was not so fast in the European guntrade as you think. In his 1884 book "Die Jagd und ihre Wandlungen" H.Corneli praises the factories of H.Pieper in Liege and Sauer & Sohn in Suhl. Pieper had a 60 hp steam engine which powered "near 400 machines" and could make guns with interchangeable parts "using the American system". Sauer & Sohn is described as the only German sporting gun maker well equipped with machines, so that little handwork is needed to make standardized guns.
What is now Czechia was then the Kingdom of Bohemia, part of the Habsburg k&k Austro-Hungarian empire. Prag was the provincial capital and Weipert the gunmaking center.
Jaroslav Lugs (a Czech btw) in his 1950s standard tome "Handfeuerwaffen" has not enough praise for the Bohemian gunmakers, but writes that they never made their own barrels, but always had to buy them in from Liege, Suhl and Ferlach.
So the idea that German gunsmithes bought in rough parts from mechanics in Czechia or Poland is ridiculous.
