Each clock is sealed and works on changes in temperature and mercury vials.
As of this posting, the more common types of Atmos clocks have been trading at prices as low as $300 and as high as $1,200.
These prices would be reflective of a typical Atmos clock - such as a model/caliber 519, 526, 528 and/or 540 and with the standard brass, gold plated case.
You can also refer to our Atmos Gallery Page for help in identifying the make and model of your clock.
of the original Antique "Atmos I" and "Atmos II", (Mercury Reutter models) the following Chart lists Atmos Clocks beginning with some of the earliest models (or calibers) and their respective serial numbers: Determining the value of an Atmos Clock depends on the model, age and the over-all condition of the clock and the actual value can vary significantly depending on what the market will bare at that particular time.
As a kid, one of the things I enjoyed about visiting “old people” was seeing their mantle or grandfather clocks: all these amazing precision devices, ticking and bonging out the passage of our lives.
Thankfully, no one gave me the opportunity to take apart their clocks.
Serial numbers from 6,500 to 24,999 were used in the 1940s.
Serial numbers from 25,000 to 126,999 were used for 1950s' Le Coultre Atmos clocks, and the 1960s' Atmos numbers start at 127,000 and run through 299,999.
Clocks made in the 1990s have a serial number in the 650,000 to 704,000 range.