The Atmos Hermes Clock

150Hermes, Jaeger-LeCoultre, and Les Cristalleries de St. Louis have combined their watchmaking and glassmaking expertise to produce the Atmos Hermes Clock, a table clock that “lives on air.” Housed in a crystal sphere, the mechanism developed by Jaeger-LeCoultre is powered by a hermetically sealed capsule containing a mixture of gases that expands when the temperature rises and contracts when it drops. Connected to the mainspring of the clock, the capsule acts like a pair of bellows, constantly winding the mechanism. A one-degree temperature difference is enough to power it for 48 hours. Its balance oscillates just twice a minute rather than the average 300 times of a classic wristwatch, which consumes 250 times more energy than an Atmos clock.


The glassmakers of Les Cristalleries de Saint-Louis created the exterior shell of the clock. The crystal globe is made using the doublé or double overlay technique, which involves coating layers of glass over each other, including a colored one. Within the company, only six master glassmakers have the skill and experience required for this process.

The Atmos Hermes Clock is a limited edition of 176 pieces.

The Atmos Hermes Clock seen from the side.
The Atmos Hermes Clock seen from the side.

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