military history of the TYPE 21 next

Dodane 1857 > Military watch chronograph > Type 21 Watch Military history > military history of the TYPE 21 next

First condition: owning the “fly-back “function i-e the possibility to set to zero

and then to restart immediately the chronometer function.

The high officials o in the Air Force have imposed this condition as it was vital for pilots when they would fly over a beacon or when they had to land relying on the time given by the control tower.

Such a demand may sound odd if one thinks about the evolution and sophistication of the present electronic outfits. Nonetheless, at that time, the reliability of the clock and watch making industry was a matter of life or death, the watch had become a flying instrument capable of replacing a failing on-board device.

Among other requirements from the French National Defence’s specifications: an autonomy of over 35 hours, a maximum time difference of 8 seconds per any 24 hours. The difference was reduced to 0.2 seconds per minute and 0.5 seconds per half hour for chronometers.

Besides the chronometer was supposed to operate at least 300 starts, stops and zero-setting in a row.

Already used by the Air Force and other corps, the Type 21 was supplied to NATO forces involved in sensitive missions.

In the 1990’s, Dodane Type 21 chronographs continued to wield their talent in Army light aviation.

Dodane 1857 - Military History Of The Type 21 Next
Watch, chronograph and onboard clock manufactured by Dodane since 1857. Specialist in chronometric instruments of navigation for military and civil aviation.
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