The Century-Long Evolution of the Jaeger-LeCoultre Atmos Clock

How the Atmos clock functions

I trace the remarkable history of the Atmos clock, from its mercury-based Reutter origins in 1930 to the sophisticated gas-filled bellows of today. This journey covers the transition through various calibers, including the iconic 526 and 540, and highlights how design innovations like the moon phase and the Atlantis model redefined this perpetual motion masterpiece.