Swiss watch, Jaeger LeCoultre, ATMOS 540, series 657893, from 1983, with 13 jewels, revised to date. We are in front of one of the most extraordinary objects in the world of horology, and its charm lies in an almost philosophical premise: it does not need to be wound manually, nor does it use a battery. It is powered by changes in temperature and atmospheric pressure in the environment. The mechanism works thanks to a sealed capsule, filled with a special gas. When the temperature varies by just 1°C, the gas expands or contracts, activating a flexible system, which tensions the spring, making the watch work. With this small temperature variation, the Atmos watch will accumulate enough energy to operate for two whole days. It will be charged continuously, to the maximum. Theoretically, as long as the watch is in a room with temperature variations, it will work perpetually, without any manual intervention. For collectors, watch enthusiasts, having an Atmos means having a living object at home that breathes with us. It will be properly packaged, in 2 boxes, for shipping.