Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,438 pages of information and 227,858 images on early companies, their products and the people who designed and built them.
of Prague, Adamov (Adamsthal) and Königgrätz (now Hradec Králowé).
It appears that Märky, Bromovsky & Schulz became Bromovsky, Schulz and Sohr some time after 1896.
A 1908 single cylinder steam engine with refrigeration compressor is on display at Vienna Technical Museum, with maker identified on the nameplate as Prager Maschinenbau AG vorm. (formerly) Ruston & Co, Bromovsky, Schulz & Sohr. Sohr was Richard Sohr.
A 1910 article features a rock-drilling ship built for the Trieste Maritime Authority by Bromovsky, Schulz and Sohr at Königgrätz (now Hradec Králowé).
1922 B,S&S were taken over by Skoda.
Photos of a 1904 steam roller here.