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The Encyclopedia of Horology

Clock · Atmos clock

Jaeger-LeCoultre Atmos du Millénaire Atlantis Clock

Partially verified

This Jaeger-LeCoultre Atmos du Millénaire 'Atlantis' clock is a barometric change-driven timepiece produced in a series of 50 pieces per year starting in 1999. The clock features a complex calendar system, including a 12-month display, a 1000-year calendar, and a lunar calendar with moon phases. Its construction consists of a wedge-shaped housing formed from bevelled glass panels, supported by three conical stainless steel feet. A spirit level is integrated into the base for precise adjustment. The movement is stainless steel, utilizing a vacuum chamber to wind the going barrel and a lever escapement regulated by an annular tension pendulum. The dial is white lacquered and displays an outer spiral scale calibrated to the year 3000. It measures 27 x 25 x 14 cm, and the case is signed by the manufacturer. The timepiece is considered in very good overall condition according to the auction house assessment.

Front view of the Atmos du Millénaire 'Atlantis' showing the glass case, conical feet, and 1000-year spiral calendar scale.
Front view of the Atmos du Millénaire 'Atlantis' showing the glass case, conical feet, and 1000-year spiral calendar scale. — 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
112
Source-reported date
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 Design

The clock features a distinct wedge-shaped housing composed of bevelled glass panels, providing visibility into the movement from multiple angles. It rests upon three conical stainless steel feet, which elevate the structure. A spirit level is inset into the base to assist with leveling, which is necessary for the function of an Atmos clock.

The white lacquered dial is marked with painted baton indexes and an inner minute ring. Above the central axis is a blue painted disc indicating the months. Below the center is an aperture for the moon phases and a lunar calendar. A significant feature of the dial is the outer spiral scale, which is calibrated to display each year until the year 3000. The hour and minute hands are blued, while the year-tracking hand is finished in white and blue.

Evidence for this section
  • “C. Wedge-shaped and constructed from bevelled glass panels, raised on three conical stainless steel feet, inset spirit level.”
  • “D. 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 and Power Source

The clock operates as a barometric change-driven timepiece, a signature design for the Atmos series. The stainless steel movement utilizes a sealed vacuum chamber that responds to temperature and barometric pressure fluctuations, which in turn winds the going barrel. This mechanism removes the requirement for manual winding.

The escapement is a lever type, controlled by an annular tension pendulum. The movement includes a locking lever located above the pendulum disc for safety during transport or storage, and a regulator situated at the top of the movement structure. The design prioritizes minimal energy consumption, allowing the barometric winding system to maintain continuous operation.

Evidence for this section
  • “M. Stainless steel, vacuum chamber winding the going barrel, lever escapement driven by annular tension pendulum, locking lever above the pendulum disc, regulator at top.”

Condition and Attribution

The auction description reports the clock's condition using a professional grading system. The overall grade for the lot is listed as 'AA', classified as very good. The individual components are evaluated as follows: the case is graded 3 (good), the movement is graded 2 (very good), and the dial is graded 3-01 (good). The hands are noted as original.

The object is attributed to Jaeger-LeCoultre and identified as the 'Atlantis' version of the Atmos du Millénaire. Production of this model began in 1999 with a limited output of 50 units per year. The case bears the signature of the manufacturer. The source document characterizes the object as a 'very fine' example of this barometric timepiece.

Evidence for this section
  • “Very fine, stainless steel and glass barometric change-driven clock”
  • “Grading System Grade: AA Very good”
  • “Case: 3 Good Movement: 2 Very good Dial: 3-01 Good HANDS Original”

Open research questions

  • What is the specific total number of units produced in the Atlantis series?
  • Does the lunar calendar require manual adjustment for leap years within the millennium scale?

Source evidence

Recorded claims and source quotations for Jaeger-LeCoultre Atmos du Millénaire Atlantis Clock
FieldSource-reported valueSource quotation
MakerJaeger-LeCoultre“Jaeger LeCoultre”
ModelAtmos du Millénaire 'Atlantis'“Atmos du Millénaire 'Atlantis'”
Production dateFrom 1999“Made in a series of 50 pieces per year from 1999”
Case materialStainless steel and glass“stainless steel and glass barometric change-driven clock”
Movement mechanismVacuum chamber and annular tension pendulum“vacuum chamber winding the going barrel, lever escapement driven by annular tension pendulum”
Dimensions27 x 25 x 14 cm“Dim. 27 x 25 x 14 cm”
Condition gradeAA Very good“Grading System Grade: AA Very good”

Visible details

  • Wedge-shaped glass case with three conical feet
  • Outer spiral calendar scale reaching the year 3000
  • Blue painted months disc located above the center
  • Integrated spirit level on the base

Research qualifications

  • Specific year of manufacture within the 1999-onwards series is not identified
  • Exact serial number not provided in the source

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

Consulted source

1000 Year Calendar Jaeger LeCoultre, Atmos du Millénaire 'Atlantis'. Made in a series of 50 pieces per year from 1999. Very fine, stainless steel and glass barometric change-driven clock with 12 month and 1000 year calendar, and phases of the moon and lunar calendar.

Reviewed 2026-10-26 · Record 60b6e540f9

Terms in this record

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

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