After World War I he worked as a director for Leyka-Film and Biehl-Film. In 1919/1920 he was vicepresident of the Film Directors' Club of Austria. From 1921 Breslauer regularly directed for Mondial-Film, under whose roof he set up his own production company, H.K.B.-Film. Its first films were "Lieb' mich, und die Welt ist mein" (1924) and "Strandgut" (also 1924), which he shot in 1923 on Corsica and the French Riviera. On some productions, for example "Oh, du lieber Augustin" (1922), he also claimed responsibility for the screenplay.