From what I read about the Bersa 83 it was the forerunner of the Bersa Thunder 380, in fact they look alike but I have never seen one or know if it shot as great or as reliable as the Bersa Thunder 380. I saw a you tube video - Bersa model 83 - YouTube
however all the guy talked about was some things that was wrong with it that looked like normal ware and tear of shooting. Sounded like he never fired it so he was not able to say how it handled or fired.