The problem with this period is that there isn't a reliable way to date individual pieces as they didn't have date codes and serial numbers were non sequential.
The big 1984 launch was the modern day Chronomat, and there were some first year specials, but I can't recall them off the top of my head. As a reasonably good idea of what was available, BreitlingSource has a catalogue from 1985 - minor differences but a generally good idea of the models available -
http://www.breitlingsource.com/books_1985.shtml