Atmos clock - Jaeger-LeCoultre - - Nickel plated brass, Crystal - 1980-1990

Swiss brand, perpetual watch, JAEGER LeCOULTRE, ATMOS, series 657893, model 540, from 1983. The watch works very well, and is VERY, VERY ACCURATE, is revised up to date, and never rewinds. The Atmos watch is powered by perpetual movement - it does not have to be wound manually. It obtains the energy it needs to run from changes in temperature and atmospheric pressure in the environment and can operate for decades without human intervention. For a two-day operation, a temperature variation of only one degree between 15 and 30 degrees Celsius or a pressure variation of 3 mmHg is sufficient. The drive spring is continuously loaded, being almost always at the maximum load limit. Scratch-resistant sapphire crystal. It is guaranteed for 600 years of operation and has 13 rubies. Furniture made of nickel-plated brass and crystal. Dimensions: height 23cm; width 21 cm; depth 16 cm. Will be properly packaged, in 2 boxes (box in box), for delivery.