The appeal of Jaeger-LeCoultre's semi-perpetual mechanism table clock "Atmos". Introducing four models

2021.06.13

Jaeger-LeCoultre is a popular brand known for its sophisticated design and high technical capabilities. The company has a collection of precision watches called "Atmos." We will explore the appeal of this watch, which is said to run semi-perpetually, and explain four of its most representative models.


Jaeger-LeCoultre and Atmos

Founded in 1833, Jaeger-LeCoultre is a luxury watch brand based in the Vallée de Joux in Switzerland.

Since its founding as a watch manufacturer, the company has carried out all of its manufacturing in-house, and its precise and elegant watches, created through numerous inventions and high technical skills, have earned it support from around the world.

Jaeger-LeCoultre's origins lie in a small watchmaking workshop that opened in the Vallée de Joux in Switzerland in 1833. In 1866, the company began its own integrated watchmaking operations, and continues to produce watches in the same location to this day.

Jaeger-LeCoultre has a model that has shocked the watch world with its unique structure: the Atmos, a precisely manufactured table clock with a semi-perpetual mechanism.

What is Atmos?

Simply place it where it is and it will continue to function almost indefinitely, and as soon as it was released, the Atmos system astonished the world.

Atmos is a French word that means "air" or "atmosphere" in Japanese.Atmos is powered by airThat is why.

Viewed from the side, Atmos appears to have a capsule-shaped box inside, filled with a sealed gas that expands and contracts with temperature changes.

This power is used to wind the mainspring, which is how the Atmos works.

The sealed gas stores enough energy for about two days when the room temperature changes by 1°C. Naturally, it is impossible for the temperature to remain unchanged, which is why Atmos can continue to function semi-permanently.

A capsule filled with gas is installed on the back of the watch, and by transferring the energy generated by a temperature difference of just 1 degree to the mainspring, the watch can continue to run semi-permanently.


Atmos model

The Atmos collection has several models in its lineup. We will explain the four most popular types.

Atmos Classic

Atmos Classic

"Atmos Classic'
Caliber 560. 15 jewels. 120 vph. Rhodium plated (225mm wide x 155mm deep x 200mm high). Price: 698,000 yen (excluding tax).

Let's start with the Atmos Classic, a model that allows you to enjoy a timeless, classic design and the exquisite finish that is characteristic of Jaeger-LeCoultre.

The ring-shaped pendulum rotates slowly, almost as if it is floating in the air. Its calm, steady ticking away of time exudes a sense of majesty.

The movement is hand-wound and is powered by the Jaeger-LeCoultre Caliber 560. It is made up of 207 parts and provides enough energy for two days with a temperature change of 1°C.

Atmos Classic Moon Phase

Atmos Classic Moon Phase

"Atmos Classic Moon Phase'
Caliber 562. 15 jewels. 120 vph. Gold plated (225mm wide x 155mm deep x 200mm high). Price: 92 yen (excluding tax).

The Atmos Classic Moonphase features a moon phase display in addition to the time and month display, and its elegant appearance is captivating. The watch's slow progression across the dial makes you feel the majestic passage of time.

The secret to its elegant movement lies in its movement: the pendulum, suspended by a steel alloy thread thinner than a strand of hair, moves slowly and steadily, minimizing energy loss due to friction.

Therefore, even the small amount of energy generated by temperature differences can keep the hands moving almost indefinitely.

Atmos 568 by Marc Newson

Atmos 568 by Marc Newson

"Atmos 568 by Marc Newson'
Caliber 568. 15 jewels. 120 vph. Baccarat crystal (width 265 x depth 230 x height 147 mm). Price: 2,824,000 yen (excluding tax).

The Atmos 568 by Marc Newson is a model in which Australian product designer Marc Newson has given a new interpretation to the classic Atmos.

By using extra white glass for the cabinet, the color tone is maintained while allowing light to shine directly onto the Atmos, giving the cabinet an almost invisible transparency.

If you are captivated by this transparency and look closer at the watch, you will see lungs in the Atmos's gear train: sealed capsules filled with a gas mixture that powers the movement, breathing it.

Atmos Transparent

Atmos Transparent

"Atmos Transparent'
Cal. 563. 15 jewels. 120 vph. Glass (W 145 x D 185 x H 250 mm). 1,004,000 yen (excluding tax).

The Atmos Transparent is a model that incorporates a new design while inheriting the legend of the semi-perpetual movement invented by engineer Jean-Léon Luther in 1928.

The distinctive timepiece, which has a calm yet innovative face, incorporates Art Deco elements and maintains its timeless beauty and refined appearance.