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The Encyclopedia of Horology

Clock · Atmos clock

Jaeger-LeCoultre Atmos du Millenaire 'Atlantis'

Partially verified

The Jaeger-LeCoultre Atmos du Millenaire 'Atlantis' is an atmospheric clock designed to function through changes in barometric pressure and temperature. The clock features a stainless steel and glass housing, constructed with bevelled glass panels and supported by three conical stainless steel feet. It incorporates an inset spirit level for stabilization. The white lacquered dial displays painted baton hour indexes and an inner minute ring, complemented by blue painted month indications and a moon phase aperture with a lunar calendar. A distinct feature is the outer spiral scale calibrated to track years through the year 3000. It is powered by a vacuum chamber that winds the mainspring, utilizing an annular tension pendulum and a lever escapement. The mechanism includes a locking lever for the pendulum. The clock is documented as being produced in a limited series starting in 1999.

The Atmos du Millenaire 'Atlantis' showing the 1000-year spiral scale, moon phase aperture, and the conical steel supports.
The Atmos du Millenaire 'Atlantis' showing the 1000-year spiral scale, moon phase aperture, and the conical steel supports. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Clock · Atmos clock
Maker / attribution
Jaeger-LeCoultre
Reference
Not recorded
Catalogue / lot identifier
286
Source-reported date
from 1999
Source-reported place
Switzerland

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and Dial

The Atmos du Millenaire 'Atlantis' is housed in a wedge-shaped case constructed from bevelled glass panels. The structure is elevated on three conical stainless steel feet and includes an integrated spirit level to ensure proper horizontal positioning of the mechanism. The visual profile is defined by the transparent enclosure which allows for view of the internal movement and pendulum.

The white lacquered dial features painted baton hour indexes and an inner minute track. It incorporates a blue painted disc for month indications and a dedicated aperture showing moon phases alongside a lunar calendar. The primary complication is an outer spiral scale calibrated to indicate years up to the year 3000. Time is displayed via blued hour and minute hands, while a separate white and blued hand serves the year indicator.

Evidence for this section
  • “Wedge-shaped and constructed from bevelled glass panels, raised on three conical stainless steel feet, inset spirit level.”
  • “White laquered with painted baton indexes, inner minute ring, blue painted months disc above, the names of the months painted in white, aperture for the moon phases below with lunar calendar, outer spiral scale calibrated for each year until the year 3000.”

Movement

The movement is constructed from stainless steel and relies on the Atmos system of energy generation. A vacuum chamber responds to fluctuations in temperature and barometric pressure, providing energy to wind the going barrel. The manufacturer notes that a temperature variation of one degree is sufficient to power the clock for two days of operation.

The escapement is a lever type driven by an annular tension pendulum. A locking lever is positioned above the pendulum disc for safety or transport, and the regulator is located at the top of the assembly.

Evidence for this section
  • “Stainless steel, vacuum chamber winding the going barrel, lever escapement driven by annular tension pendulum, locking lever above the pendulum disc, regulator at top.”
  • “a fluctuation of only one degree is sufficient for two days”

Condition and Attribution

The auction description reports that the object is in very good condition across all primary categories. Specifically, the case, movement, and dial are all graded as '2 Very good'. The hands are noted as original to the piece.

The clock is identified as part of a series produced by Jaeger-LeCoultre starting in 1999, with an intended annual production limit of 50 units. The case is signed by the maker.

Evidence for this section
  • “Grading System Grade: AA Very good Case: 2 Very good Movement: 2 Very good Dial: 2-01 Very good HANDS Original”
  • “Case signed.”
  • “Made in a series of 50 pieces per year from 1999.”

Open research questions

  • Are there specific serial number ranges for each production year of the Atlantis series?
  • What are the precise historical differences between this model and standard Atmos clocks in terms of the lunar cycle accuracy?

Source evidence

Recorded claims and source quotations for Jaeger-LeCoultre Atmos du Millenaire 'Atlantis'
FieldSource-reported valueSource quotation
MakerJaeger-LeCoultre“Jaeger Le Coultre”
ModelAtmos du Millenaire 'Atlantis'“Atmos du Millenaire 'Atlantis'”
Date of productionFrom 1999“Made in a series of 50 pieces per year from 1999.”
Dimensions27 x 25 x 14 cm“27 x 25 x 14 cm”
Winding mechanismBarometric pressure and temperature driven“barometric changes driven clock”
Dial features1000-year spiral scale, moon phase, and lunar calendar“1000 year calendar, phases of the moon and lunar calendar”
Escapement typeLever escapement“lever escapement driven by annular tension pendulum”

Visible details

  • Exterior is composed of bevelled glass panels with stainless steel supports.
  • Dial includes an outer spiral scale for 1000-year tracking.
  • The movement utilizes an annular tension pendulum with a locking lever.
  • Includes an integrated spirit level at the base.

Research qualifications

  • The specific production number within the 50-piece annual series is not provided.
  • The long-term performance through the year 3000 is a manufacturer-stated capability rather than an empirical observation.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

'1000 Year Calendar' Jaeger Le Coultre, Atmos du Millenaire 'Atlantis'. Made in a series of 50 pieces per year from 1999. Very fine, astronomic, stainless steel and glass barometric changes driven clock with 12 months and 1000 year calendar, phases of the moon and lunar calendar. Accompanied by a fitted box.

Reviewed 2026-10-26 · Record b008cd49e6

Terms in this record

Glossary explanations for terms named in this object’s record.

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