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The Encyclopedia of Horology

Clock · Mantel clock

Jaeger-LeCoultre Atmos Clock, Reference 528-8

Partially verified

This Jaeger-LeCoultre Atmos mantel clock, identified as reference 528-8, is a mechanical timepiece notable for its self-winding mechanism driven by ambient atmospheric pressure and temperature fluctuations. The clock functions without the need for manual winding, batteries, or external power sources, utilizing a torsion pendulum to regulate time. Because of the delicate nature of the movement, which is highly sensitive to dust, the mechanism is housed within a protective glass casing. The case structure is crafted from brass, featuring a gilded finish consistent with classic Atmos designs. The dial omits a seconds hand to conserve energy and ensure operational stability. Its performance and value are directly linked to its maintenance history, with serviced units being preferred by collectors.

Front view of the Jaeger-LeCoultre Atmos clock, showing the gold dial, brass frame, and glass enclosure.
Front view of the Jaeger-LeCoultre Atmos clock, showing the gold dial, brass frame, and glass enclosure. — Zamanito. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Clock · Mantel clock
Maker / attribution
Jaeger-LeCoultre
Reference
528-8
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
Not established
Source-reported place
Not established

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

Movement and Mechanism

The Atmos clock operates using a specialized mechanical movement driven by a hermetically sealed capsule containing a mixture of gas and liquid. This capsule expands or contracts with the slightest changes in atmospheric pressure and temperature, winding the mainspring automatically. The movement relies on a torsion pendulum, which oscillates at a slow rate to conserve the limited energy generated by the barometric system.

Because this system is extremely precise and sensitive to environmental contaminants, the entire movement is contained within a rigid glass and brass housing. The absence of a seconds hand is a design feature intended to reduce the energy load on the movement, thereby maintaining the stability of the timekeeping function. Various calibers have been used in the Atmos series, including the 528-8 identified here.

Evidence for this section
  • “انرژی مورد نیاز خود را صرفاً از تغییرات دمای محیط و فشار اتمسفر تأمین می‌کند”
  • “ساعت رومیزی مکانیکی با پاندول پیچشی”
  • “شرکت سازنده از افزودن عقربه ثانیه‌شمار خودداری کرده است”

Case and Design

The gilded brass finish provides a decorative aesthetic often associated with the model's history as a luxury item. The design allows for a clear view of the complex internal mechanism from all sides, including the rear and the dial.

The dimensions for standard models of this type are approximately 22.5 cm in height, 20 cm in width, and 15.5 cm in depth. The dial displays the time using simple numerals, maintaining a minimalist appearance that complements the intricate technical nature of the clock's base and pendulum assembly.

Evidence for this section
  • “بدنه مدل‌های کلاسیک معمولاً از برنج با روکش طلا”
  • “مدل‌هایی مانند «اتموس کلاسیک» دارای ابعادی در حدود ۲۲.۵ سانتی‌متر ارتفاع، ۲۰ سانتی‌متر عرض و ۱۵.۵ سانتی‌متر عمق هستند”

Operational Maintenance

The long-term operation of the Atmos clock is dependent on the cleanliness of the movement. Internal dust can interfere with the delicate energy-transfer process, often necessitating professional cleaning and servicing.

Prospective owners are encouraged to verify the state of the glass housing and the accuracy of the torsion pendulum. Given the specialized nature of the automatic winding system, obtaining a clock with verified technical certification or known service history is considered essential for ensuring ongoing function.

Evidence for this section
  • “سلامت فنی این ساعت‌ها اهمیت بسیاری دارد”
  • “در بازار فروش، نسخه‌های «سرویس‌شده» یا «بازسازی‌شده» توسط متخصصین دارای ارزش بالاتری هستند”
  • “توصیه می‌شود که نمونه‌های خریداری شده دارای تأییدیه‌های فنی یا سوابق تعمیراتی معتبر باشند”

Open research questions

  • What is the specific production date for this individual reference 528-8 unit?
  • Is there verifiable evidence of a recent factory-authorized service for this specific piece?

Source evidence

Recorded claims and source quotations for Jaeger-LeCoultre Atmos Clock, Reference 528-8
FieldSource-reported valueSource quotation
MakerJaeger-LeCoultre“شرکت Jaeger-LeCoultre”
ModelAtmos“ساعت اتموس”
Reference528-8“مرجع (Ref): 528-8”
Energy SourceAtmospheric pressure and temperature“انرژی مورد نیاز خود را صرفاً از تغییرات دمای محیط و فشار اتمسفر تأمین می‌کند”
Dial featureNo seconds hand“شرکت سازنده از افزودن عقربه ثانیه‌شمار خودداری کرده است”
Case materialGilded brass“برنج با روکش طلا”
Mechanism typeTorsion pendulum“ساعت رومیزی مکانیکی با پاندول پیچشی”

Visible details

  • Glass-enclosed brass case
  • Torsion pendulum at base
  • Movement visible through dial
  • Gold-tone dial with Roman numerals

Research qualifications

  • Service history is not specified in the source
  • Actual date of manufacture is unverified

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

Consulted source

ژژر لکولتر اتموس؛ ساعت رومیزی

Reviewed 2026-11-02 · Record 8e8214f86a

Terms in this record

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

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