Jaeger LeCoultre Atmos IV Calibre 532

Dimensions: H x W x D: 22 x 18 x 13,5 cm

Description:
Extremely rare Atmos IV calibre 532 in a gold-plated case.
Black dial ring with gold numerals 3, 6, 9, 12 and indexes for the remaining hours. As usual with many Atmos watches of the 50s, the 3 and the 9 are "lying".
Serial number: 71436
Year of manufacture: 1955

The Atmos IV calibre 532 differs only slightly from the Atmos V calibre 526, which is far better known and many times more frequently made. Only on closer inspection is it noticeable that the vertical uprights of the case are mounted at right angles and not diagonally across the corner as on the Atmos V. In addition, the front uprights are discreetly accentuated by a shape that tapers towards the front.
The front door has a circumferential frame and a centrally positioned pull knob for opening.

An Atmos V to compare the above details can be found here.

The Atmos IV is generally quite rare. It was produced with calibres 532 and 522. The better known watch from the Atmos IV family is the so-called "Tuxedo", which has the same case shape, but differs from the model offered here by a very striking front door.

Condition:
Beautiful and authentic condition of the case with light traces of use that are usual for its age.
The movement has been revised and runs perfectly and reliably.

Interesting facts:
The "clock that lives on air" uses the "breathing movements" of a gas-filled bellows created by temperature fluctuations to wind the movement.
The movement of the clock is striking because of its cylindrical box on the back. Inside, a bellows-shaped expansion chamber contains chloroethyl, a gas that expands particularly strongly between 10 °C and 27 °C.
A temperature difference of just one degree Celsius winds the watch for 48 hours. This interesting winding mechanism is complemented by an exquisite movement of extreme precision with a heavy torsion pendulum.
The condition for the accuracy of the clock is a stable and vibration-free installation.

For decades, the Atmos has been Switzerland's official state gift to prominent visitors, e.g. politicians from abroad.

[Source: Jean Lebet - Living on Air / Jürgen Abeler - Ullstein Uhrenbuch]

Price: 3500,-€