空气钟 - Jaeger-LeCoultre - - 水晶 - 1980-1990

Since the late 1930s, Atmos watches have always been manufactured in the same factory in the Jura Mountains of Switzerland by highly skilled watchmakers. The Atmos clock is powered by perpetual motion - it doesn't need to be manually wound. It gets 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 operating spring is continuously charged, being almost all the time at the maximum load limit . Swiss branded watch,perpetual, JAEGER LeCOULTRE, ATMOS, series 680173, model 540, from 1983. The watch works very well, and is VERY, VERY PRECISE, is revised up to date, and is never worn.Scratch-resistant sapphire crystal. It is guaranteed for 600 years of operation, and it has 13 rubies. Gold-plated brass furniture and crystal. Dimensions: height 23.5cm; width 21cm; depth 16cm. It will be properly packed, at least 2 boxes (box in a box), for shipping.