Chronograph dodane - History of Chronograph

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Chronograph

DODANE 1857

Five Generations of Dodane

Making the Legendary Chronograph TYPE 21

LEGACY

Specialist of chronograph timepieces for civilian and military aircrafts, Dodane continues its know-how through five generations of chronograph watchmaking heritage.

"Our great-grandfather, Alphonse Dodane Gabriel, was already convinced at the beginning of the century that the conquest of the air would be just as important as the road. He therefore gave the house of Dodane its very special character in diversifying its business to include the manufacture of traditional watchmaking chronograph equipment and onboard chronograph for French fighter aircrafts”.

Desiring to share our passion for the beautiful mechanical chronograph watch, we wanted to pay tribute to the legendary chronograph TYPE 21, supplied to the French aviation pilots since the 1950s, by re-issuing this chronograph in a limited edition.

Indeed, chronograph watches were developed for the French military based on very specific and demanding guidelines from the high military command.

The technical qualities of the TYPE 21 watch chronograph, associated with an authentic style, made it a sleek chronograph timepiece recognized for its strong character and a symbol of watchmaking precision in the service of aviation.

While ensuring their accuracy, these chronograph watches had to endure extreme stress in terms of acceleration, vibration, temperature variation and resistance to magnetic effects.

CONTINUITY

The military also wanted their pilots to have the ability to reset and restart their chronograph watch while in flight using only one pusher in order to measure a distance or a time without taking their eyes off the horizon or their instruments. The ‘fly-back’ feature on the Dodane chronographs have been requested and used since the 1950s until today.

Also, retaining the features and personality of the original chronograph piece, the third generation of the TYPE 21 watch is assembled in accordance with centuries-old watchmaking chronograph traditions and enjoys the same attention as yester years.

Moreover, the chronograph TYPE 21 is driven by the movement 42021. This caliber, of very high quality design and precision, is assembled by Dubois-Depraz, now a century old Swiss supplier, specializing in mechanical movements in horological chronograph complications.

The technical characteristics of the chronograph watch TYPE 21 can be certified, upon request, as a Chronometer by the National Observatory of Measuring Time of Besançon, France.

A military watch chronograph can be designated an "Observatory Chronometer" if it meets strict standards of accuracy during 15 consecutive days of testing under 5 positions and at different temperature settings. The uniqueness of this military watch chronograph control lies in the fact that it applies only to a fully assembled watch unlike its counterpart that tests solely non-cased movements.

The range of the new version is composed of 7 different models of chronograph watch type21, from two sets of calibers - 2 and 3 chronograph counters - and three different bezels:

1. Polished chronograph bezel with inversed graduation,

2. Brushed chronograph bezel with increasing graduation.

3. Black anodized chronograph bezel with graduation to 60 minutes.

Of these 7 models of chronograph, Dodane designed a version with a yellow dial whose characteristic specific coating is inspired by on-board watch chronographs for low light use destined for civilian and military equipment.

The Type 21 is a very high-precision chronograph. It is equipped with a special mechanism called “fly-back” enabling to measure pre-set time with continuous or interrupted operations.

This function enables to start, stop and restart the central chronograph hand telling seconds divided to the 5th as well as the hands telling minutes and hours.

The chronograph's Start function is set by pushing the first push-button A. With a second push on this button, the central hand is stopped. A third push on the same button re-starts the chronograph hand. This enables to stop a time measurement and re-start it at the stop mark.

Zero-setting chronograph function of seconds, minutes and hours is obtained by pushing the second push-button B.

The Fly-back device allows it to be instantly reset during the chronograph’s operation by pressing the second button (B), without having to first stop the operation with the first button (A). When pressure is maintained on the second chronograph button, the hand stays at zero and only starts again when pressure is released.

The chronograph device enables an aircraft pilot or ship’s captain to follow instructions and change headings according to a predefined course. Once a sequence has elapsed, pressure on the chronograph button launches the following sequence.

The rotating bezel completes the sums of chronograph minutes and hours by acting as a countdown timer. For a four hour flight, the pilot enters the number 4 opposite the hour hand of the main dial, and starts the chronograph: when the hour hand is opposite the luminous 0 mark, the four hours have elapsed.

Dodane 1857 - Chronograph Dodane - History Of Chronograph
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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