Atmos clock dating

These prototypes were never sold and never called the Atmos 0 at that time.

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They are very nicely made and typically they have a plate saying "Reutter Brevet" (Brevet = Patent).

In September 1932 Le Coultre entered an agreement to develop movements for CGR and first deliveries were made in mid 1933 and these movements were called the 30" A calibre.

Serial number's for the Atmos II and Atmos III are somewhat intertwined because of Le Coultre purchasing the entire stock of CGR.

There is evidence of overlapping in all Le Coultre models; there are no "absolutes" of serial numbers and caliber numbers.

Connoisseurs of elegant forms, precious materials and traditional craftsmanship, do so as well.

Because every Atmos is still made entirely by hand; and with some models a single clock takes a whole month to produce.In 1928 a Neuchatel engineer called Jean-Leon Reutter built a clock driven quite literally by air.But it took the Jaeger-Le Coultre workshop a few more years to convert this idea into a technical form that could be patented.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.The Atmos II and the Atmos III have serial numbers ranging from around 4,000 to 59,999 and production went from 1936 until late 1955.

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