Glenn J: thanks for informations! i have found out something about him.
He was born in 1876 in family of Bedřich (Friedrich) Bernau, who was amatour historian and writer (his former name was not som german, but pure czech - Přemysl Cyril Bačkora) and author of book "Political district of Dubá" (Der politische Bezirk Dauba) published in 1888 and was for this monography awarded with medal on Provincial Jubilee exposition in Prag in 1891. His father, Josef Množislav Bačkora (02.02.1803 - 05.12.1876), was pedagogue, writer and czech patriot and his father, František (Franz) Bačkora worked as a school assistant
..and if everithing goes OK, I will have his photo in uniform (at least scan of it) in week or so.. :)