‘Atmos’ is the collective name of a mechanical torsion pendulum clock manufactured by Jaeger-LeCoultre in Switzerland. This is a piece which does not need to be wound manually like other mechanical timekeeping pieces. The Atmos is powered up by minute variations in temperature, causing an internal gas canister inside its chamber to contract and expand, thus providing the heartbeat of the clock. Due to this motion, the mainspring constantly winds. A both classic and modern timepiece.