CHRONOGRAPH A RETOUR GEISMAR
With Breitling 639 Base
This Bomber stopwatch mechanism was considered specialized equipment utilized by many European Airforce
in the 1920’s and ’30s. Producers included **Breitling, Minerva, Leonidas, Universal, Zenith, and **Geismar
The French Lip company created a different movement then those above that had a similar look and use.