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Jaeger LeCoultre, Atmos Clock with Moon Phase, Fontainebleu, 1990s

About the Item

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 in the price. 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
  • Creator:
    Jaeger-LeCoultre (Manufacturer)
  • Dimensions:
    Height: 9.85 in (25 cm)Width: 7.88 in (20 cm)Depth: 6.3 in (16 cm)
  • Style:
    Modern (Of the Period)
  • Materials and Techniques:
  • Place of Origin:
  • Period:
    1990-1999
  • Date of Manufacture:
    1993
  • Condition:
    Very good condition. The clock runs absolutely reliably and accurately. Impeccable case condition.
  • Seller Location:
    Greven, DE
  • Reference Number:
    1stDibs: LU5419241300382

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Jaeger LeCoultre, Atmos Fontainebleu, Swiss Made in 1986
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Located in Greven, DE
Jaeger LeCoultre - Atmos Fontainebleu Switzerland Year of construction 1986 Dimensions: H x W x D: 25 x 20 x 16 cm Description: Atmos calibre 540 in the rare "Fontainebleu" version in a wooden case. Square ring dial with rounded corners. Roman numerals for hours, fine minute track, Breguet hands with counterweights. "SWISS MADE" is printed below the 6. A manufacturer's engraving and the calibre number can be found on the front movement plate. 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 various versions - with a square or round dial, with a moon phase, with a black lacquered or mahogany case. Although the clock offered here dates from 1986, it was only listed in the 1987 and 1988 catalogues. Ref. 220.030.4 Serial number: 620514 Year of manufacture: 1986. Condition: Freshly overhauled, very good condition of the movement. Flawless case condition. Interesting facts: Generations of inventors have endeavoured to construct a perpetual motion machine - and one after the other was disappointed to discover that their designs did not work. Today we know that it is technically impossible to build a machine that works continuously without consuming energy. Apart from wear and tear, a machine only works as long as it is supplied with energy: Electricity, gas, petrol... Without human intervention and practically without wear and tear, the Atmos does not run without energy consumption, but it is fed by an energy source that can be described as "eternal": It draws its energy from the constant fluctuations in air temperature. The Atmos literally lives from the air. In order to utilise the temperature fluctuations as an energy source, a suitable medium had to be found. The choice fell on ethyl chloride (C2H5Cl) - a substance that dentists know as an anaesthetic. Ethyl chloride has a very high coefficient of thermal expansion between 10 and 27°C, i.e. the volume change is particularly large in this temperature range. The round can...
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