Watch Wiki

The Best Watches and Watch Brands

User Tools

Site Tools


jlc_631

Table of Contents

JLC 631

Calibre 631 was a quartz watch movement with a mechanical chronograph developed by Jaeger-LeCoultre and also used by IWC.

Introduced in 1987, Calibre 631 was the second member in the Jaeger-LeCoultre Mechaquartz family after Calibre 630. It was a complicated movement, with 25 jewels and 233 components.

There are two motors in the calibre

  • One powers the main timekeeping hands at a frequency of 1 Hz
  • A second powers the mechanical chronograph at 4 Hz

Since the chronograph is mechanical, it has the same feel as a conventional chronograph movement, including mechanical zero reset. Yet the Mechaquartz was much more compact than a conventional automatic chronograph movement.

Note There is conflicting information on the quartz frequency, with some sources claiming dual 1 KHz and 4 KHz crystals and others claiming 32 KHz.

Applications

Manufacturer:

Description:

Functions:

  • Hour, minute hands
  • Small seconds at 6 00
  • Chronograph with 30 minute and 12 hour subdials at 9 00 and 3 00, respectively

Data:

  • H 3.8 mm
  • D 23.3 mm
  • 25 jewels
  • 233 components
  • Frequency 32 KHz

Production period:

We use cookies and other tracking technologies to improve your browsing experience on this website and for data collection for personalized ads.More information
jlc_631.txt · Last modified: 11.10.2021 21:09 (external edit)

Copyright © Watch Wiki: The Best Watches and Watch Brands | Impressum | Privacy Policy