The Navitimer (Reference 1806) was a continuation of the series of aviation chronographs that Breitling had introduced in 1954. For the Navitimer, Breitling modified the Chronomat’s logarithmic slide rule to a pilot’s time-speed distance flight computer, and added scales used by pilots to calculate fuel consumptions, average speeds and climbing speeds. Breitling suggested that the Navitimer was designed for specialists in speed – not only pilots, but also rally drivers and other sportsmen.
The Cosmonaute (Reference 1809) incorporated the same pilot’s tools as the Navitimer, with the watch having true 24 indication, meaning that the hour hand made one revolution per day. The Reference 809 Cosmonaute had been introduced in 1962 and become the first Swiss wristwatch in space when it was worn by astronaut Scott Carpenter on May 24, 1962.
The fourth and fifth Chronomatic models to be housed in the “pizza” cases were the Reference 7651 models. The Reference 7651 Co-Pilot model was a continuation of the series of chronographs introduced by Breitling in 1953, with the minute recorder marked to count the 15 minutes for the pilot’s pre-flight check. While all other Chronomatic watches introduced in 1969 had recorders for 12 hours, the Reference 7651 had six-hour capacity. The “Yachting” version of the Reference 7651 featured a rotating bezel that was marked in red and white segments, to count down the 15 minutes to the start of a yacht race.
Breitling’s 1969 catalog also showed a Reference 2115 GMT model in the “pizza” case, but this model seems to have only been introduced later, in a different color scheme.
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