Dating an atmos 528 6 clock
In late 1983, Le Coultre totally resigned the Atmos and came up with the 540 caliber.
They also stopped the practice of labeling the models numerically (Atmos 0 - Atmos VIII).
On June 01, 1929, Compagnie generale de radio (CGR) created a department devoted to the manufacture and sales of the Atmos clock.
Jean-Leon Reutter was appointed to manage that department.
It is unclear how many were made and sold but they are referred to these as Atmos I's.
Two French patents were granted for the Atmos 0 (624.595) and for the Atmos I (664.689) but that company never produced the Atmos 0.
Annual production of these movements was between one and two thousand for years 19.
On July 27, 1935, CGR agreed to transfer all production to Le Coultre and all remaining stock and work in process.
Because every Atmos is still made entirely by hand; and with some models a single clock takes a whole month to produce.
Kennedy, Sir Winston Churchill, General Charles De Gaulle, and Charlie Chaplin.
Jean-Leon Reutter, in France, designed the Atmos Clock in 1927 and this is referred too as the Atmos 0.
So it's not surprising that 60 million Atmos clocks together consume no more energy that one 15-watt light bulb.
All its other parts, too, are not only of the highest precision, but also practically wear-free.
An Atmos can therefore expect to enjoy a service life of a good 600 years, although with today's air pollution a through cleaning is recommended about every twenty years.