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Jaeger-LeCoultre Geophysic True Second — Q8018420

Jaeger-LeCoultre

Geophysic True Second

Q8018420

A deadbeat seconds dress watch rooted in mid-century scientific heritage.

Estimated market value
$6,450
Confidence: High

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Overview

The Jaeger-LeCoultre Geophysic True Second (ref. Q8018420) is a 39.6 mm stainless steel dress watch distinguished by its deadbeat seconds complication, in which the seconds hand advances in precise, discrete one-second steps rather than a continuous sweep. Housed beneath a white lacquered dial, Calibre 770 delivers this exacting display with the restrained elegance characteristic of the Geophysic line. The result is a timepiece that bridges horological precision and classical dress-watch aesthetics.

History

The Geophysic name traces its origins to the original Jaeger-LeCoultre Geophysic of 1958, a watch developed in the context of the International Geophysical Year and prized for its antimagnetic and precision credentials. Jaeger-LeCoultre revived the name in 2015 with a modern collection that honoured that scientific spirit, and the True Second variant — introduced as part of that relaunch — brought the deadbeat seconds complication to the fore. The Q8018420 remained in production through approximately 2020, occupying a respected position among contemporary dress watches with in-house complications.

Notable points

  • Deadbeat seconds: Calibre 770 drives the seconds hand in crisp, one-second jumps, a complication historically associated with precision observatory timekeeping.
  • White lacquered dial provides a clean, luminous backdrop that keeps the focus on the disciplined seconds display.
  • At 39.6 mm in stainless steel, the case sits at a classically proportioned size well suited to formal wear.
  • The Geophysic line revives a lineage dating to 1958, lending the reference a direct connection to Jaeger-LeCoultre's mid-century scientific watchmaking.
  • Calibre 770 is an in-house movement, reflecting Jaeger-LeCoultre's long-standing manufacture tradition.

Specifications

Brand
Jaeger-LeCoultre
Collection
Geophysic
Reference
Q8018420
Years of production
2015 – 2020
Case
39.6mm Stainless steel
Case material
Stainless steel
Case diameter
39.6 mm
Movement
Cal. 770
Crystal
Sapphire
Dial
White lacquered, deadbeat seconds
Bezel
Polished steel
Bracelet / strap
Leather strap
Water resistance
50 m
Power reserve
40 h
Type
Dress
Worn as
Men's
Also known as
ジオフィジック

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