Model nr: A59028
The 'Jupiter' was introduced in 1980 by Breitling in the year following the take-over of the company by Mr Ernest Schneider. Along with the closely related 'Mars' and 'Pluton' chronographs, the Jupiter was designed for military pilots but also with an eye on the civilian aviation market. There were various bezel options and differences between the three models but the movements and therefore the functions are identical.
At this time, all Breitling pilot's watches were considered part of the 'Navitimer' range and the Jupiter was named 'NAVITIMER QUARTZ 2300' on the dial. It has a non-ratcheted combination bezel comprising a circular slide-rule (Type 52 derived from the Navitimer ref 806) and a wind-rose (compass degrees) scale. Between the these two scales are flight levels in two colours for VFR/IFR and East/West flight separation.
The dial has a white Breitling wings logo, the design of which was heavily influenced by the logo of the AOPA (Aircraft Owners and Pilots' Association). The model reference 80390 is stamped into the case back.
More here: https://www.watchuseek.com/threads/breitling-jupiter-jupiter-pilot-a-brief-history-to-aid-identification.91/