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This is a beautiful Atmos clock, made and sold by Jaeger Le Coultre, a well known Swiss company. It is invery nicecondition. The finish is much better than most this age, and is a reflection of the care the previous owner has given it.
It is in good running order and keeping excellent time.
The name infers that it runs on the atmospheric pressure changes. It in fact runs on temperature changes. It winds with as little as a 2 degree change in temperature. This is accomplished by an ingenious set of bellows, filled with a compound gas that is very volatile at normal room temperature and causes the bellows to expand and contract with a small temperature change. This expansion and contraction though a small chain, pulleys and a ratchet system winds the mainspring, which powers the clock.
These are sometimes called perpetual motion clocks, because they do not require winding. It\'s a misnomer, but effective marketing.
This clock was made by Jaegar Le Coultre, a famous swiss firm, who continues to make these clocks today. The serial number of this clock is 191512. It is a528 model.
For information on the history and rarity of these clocks, see:
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Ask questions if interested.
S&H will be paid for by the buyer, shipping from 60525
Thanks for looking and good luck
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