====== JLC 630 ======
**Calibre 630** was a compact [[quartz]] watch movement with a mechanical [[chronograph]] developed by [[Jaeger-LeCoultre]] and also used by [[IWC]].

===== Overview =====
Introduced in [[1987]], Calibre 630 was the first member in the [[Jaeger-LeCoultre Mechaquartz]] family. It was a complicated movement, with 25 jewels. At the time, it was advertised as a revolutionary thin chronograph, measuring just 23.30 mm diameter and 3.70 mm thick. This made it 1/3 the volume of most contemporary chronograph movements and 40% smaller than the smallest equivalent movement on the market.

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.

Calibre 630 differed from Calibre 631 in that it included a [[moon phase indicator]].

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. It is likely this confusion comes from the 1 and 4 Hz motors.

===== Applications =====
Calibre 630 was used in chronograph watches in the 1980's and 1990's, though not as widely as [[JLC 631|Calibre 631]] 

  * [[Jaeger-LeCoultre Ladies Odysseus Chronograph]]
  * [[IWC Porsche Design Titan Moonphase Chronograph]]
  * [[IWC Ladies Da Vinci Moonphase Chronograph]]
  * [[IWC Pilot's Watch Chronograph Mechaquartz]]

===== External Links =====
  * [[http://www.qahill.com/tz/mq/mq.html|Mechaquartz Chronographs]]

===== See Also =====
  * [[Frédéric Piguet]] [[Meca-Quartz]]
  * [[Seiko]] [[Seiko 7A|7A "Mecha-Quartz"]]


<WRAP ud ud_mov>

**Manufacturer:**
  * [[Jaeger-LeCoultre]]

**Description:**
  * [[Quartz]] movement with mechanical [[chronograph]]

**Functions:**
  * Hour, minute hands
  * Small seconds at 6 00
  * Moon phase indicator
  * Chronograph with 30 minute and 12 hour subdials at 9 00 and 3 00, respectively

**Data:**
  * H 3.70 mm
  * D 23.30 mm
  * 25 jewels
  * 233 components
  * Frequency 32 KHz

**Production period:**
  * [[1987]]-
</WRAP>

{{tag>Movements Quartz_movements Jaeger-LeCoultre_calibres Jaeger-LeCoultre_quartz_calibres Jaeger-LeCoultre_Mechaquartz_calibres}}