I know of an Emil Richter in Wroclaw/Breslau(German) that hung out his gunmaking shingle in 1865. I do wonder since the name of Wroclaw is Breslau, the German version, if it wasn't sourced from a German mechanic?

Piotr J. Bochyński would know I am sure. I think Mr. Neuberger posted his email contact in the thread below.

https://www.doublegunshop.com/forum...p;Words=pitor&Search=true#Post580374

Serbus,

Raimey
rse