Jaeger Lecoultre Atmos Clocks

Atmos Clocks were invented in 1928 by Jean-Léon Reutter and brought to market by Jaeger-LeCoultre in the 1930s. The clock is driven by a mainspring, which is wound by the expansion and contraction of a liquid and gaseous ethyl chloride in an airtight chamber called bellows.

When the temperature rises, the ethyl chloride vaporises and expands, compressing a spring. When the temperature falls, the gas condenses, and the spring expands.

The continuous motion winds the mainspring, giving enough energy to run the entire clock. A 1-degree change in temperature is enough to run an Atmos clock for 4.3 days.

For timekeeping, a torsion pendulum is used. It consumes far less energy than an ordinary pendulum, and it twists on the end of the wire instead of swinging left to right. The motion is 30 times slower than that of a typical long-case clock pendulum.

Other than occasional servicing due to wear, the clock runs without human intervention, making them extremely hassle-free with a totally silent movement.

Our Jaeger-LeCoultre Atmos Clock collection includes a wide selection of the world-famous ‘perpetual motion’ Jaeger-LeCoultre clock, which is known for its tranquil, silent movement and low-maintenance timekeeping.

All our Atmos clocks are fully serviced by our in-house Atmos specialist and come with a complete overhaul guarantee. Upon purchasing any of our Atmos clocks, you will receive a one-year guarantee, a full set-up instruction guide, and ongoing support for any questions or troubleshooting.