Bronza is the author of the first stamps of Moldova issued in June 1991. He designed the first stamps of the Pridnestrovian Moldavian Republic issued in December 1993. Bronza designed the third definitive stamp issue of Transnistria (1997). He also created a series of stamps for the 5th anniversary of the events in Bender (1997), a series of stamps "Historical and modern coats of arms of cities of Transnistria" (1999), and the 200th anniversary of Alexander Pushkin issue (1999).