Perpetual Clock Atmos Borne Maison Jaefer Lecoultre, Art Deco Style, Clock In Box

Old perpetual clock from the prestigious Jaeger Lecoultre house. Very nice atmos model with a terminal shape. Silver dial with gold hour graduation and blued gold hands at the front. Under the housing is the stop lever to be operated from the front. On the side are two screws that allow the watch to be leveled. On the back, we see the golden pressure box, stamped LeCoultre & Cie Swiss. Much less classic format than the usual cobblestone. Perimeter decorated with a very elegant frieze with Art Deco motifs. Very good condition. Has its original box. 21cm high In 1927, the young engineer Jean-Léon Reutter presented the prototype of the Atmos watch he had developed. The echo in the press was great and he thus concluded a contract with the General Company of Radiology, which built and marketed the "Atmos I" from 1930 under the direction of Reutter. As there were always problems with the watches, the movements were made by the company Le Coultre et Cieen Suisse from 1933 and in 1935 the production rights of the Atmos watch were transferred to Ets. Ed. Jaeger were transferred. The focus was on developing a simpler and more robust engine, and from 1938 began the era of Jaeger-LeCoultre's Atmos. The "watch that lives on air" uses the "breathing movements" of a gas-filled bellows, which occur during temperature variations, to wind the watch movement. The movement of the watch is distinguished by its cylindrical case on the back. Inside, a bellows-shaped expansion chamber contains chloroethyl, a gas that expands particularly between 10°C and 27°C. The bellows then expands very significantly. A temperature difference of just one degree Celsius winds the watch up for 48 hours. This interesting winding mechanism is complemented by an excellent movement of extreme precision with a heavy torsion pendulum (rotating pendulum). The precision of the watch is conditioned by a stable and vibration-free installation.