Jaeger LeCoultre - Atmos Fontainebleu with moon phase
Switzerland
Mahogany, brass, glass
Year of manufacture 1993
Dimensions: H x W x D: 25 x 20 x 16 cm
Description:
Atmos Fontainebleu calibre 540 in the rare moon phase version.
Round ring dial with Roman hour numerals, fine minute track and Breguet hands with counterweights.
At the 6 o'clock position we see the moon phase with golden stars on a deep blue background and the imprint "SWISS MADE".
A "Jaeger LeCoultre" imprint can be seen at the bottom right of the front disc.
The Atmos Fontainebleu was listed in the collection from 1987. It was available in different versions - with a square or round dial, with a black lacquered or mahogany case. From 1990 to 1997, the Fontainebleu was also produced with a moon phase.
Ref. 223.029.3
Serial number: 675028
Year of manufacture: 1993.
Condition:
Very good condition. The clock runs absolutely reliably and accurately. Impeccable case condition.
The wall console (please have a look at the photos) is included.
We ship worldwide!
Interesting facts:
In 1927, the young engineer Jean-Léon Reutter presented the prototype of the Atmos clock he had developed.
The response in the press was great and he signed a contract with the Compagnie générale de radiologie, which built and sold the "Atmos I" from 1930 under Reutter's direction.
As there were repeated problems with the watches, the movements were manufactured by Le Coultre et Ciein Switzerland from 1933 and in 1935 the production rights for the Atmos clock were transferred to Ets. Ed. Jaeger in 1935.
They focussed on developing a simpler and more robust motor and from 1938 the era of the Atmos from Jaeger-LeCoultre began .
The "clock that lives on air" utilises the "breathing movements" of a gas-filled bellows caused by temperature fluctuations to wind the movement.
The movement of the clock stands out due to its cylindrical box on the back. It contains the saturated gas chloroethyl in an expansion chamber. Under the influence of temperature fluctuations, the ratio between liquid and gas changes and consequently the pressure in the expansion chamber also changes. Similar to a bellows, the chamber expands and exerts pressure on a spring. The chain mounted on the spring transmits the force to the movement and, with a temperature fluctuation of around 1 degree C°, supplies the energy for approximately 48 hours of running time.
This interesting winding mechanism is complemented by an exquisite movement of extreme precision with a heavy torsion pendulum.
For decades, the Atmos was Switzerland's official state gift to prominent visitors, e.g. politicians from abroad.
[Source: Jean Lebet - Living on Air / Jürgen Abeler - Ullstein Uhrenbuch]
You can find out more about the Atmos Fontainebleu in the specialist literature:
Jean Lebet - Living on Air p. 81
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