====== JLC 489 ======
{{wst>image_r|JLC_489|Calibre 489|240px}}
**Calibre 489** was the first [[alarm]] [[movement]] from [[Jaeger-LeCoultre]].

In 1949, Jaeger-LeCoultre began working on an alarm movement to rival the [[Vulcain Cricket]]. Their answer was introduced at Basel in [[1951]], the [[manual winding]] [[Jaeger-LeCoultre Memovox|"Wrist Alarm" and later Memovox]] powered by Calibre 489. It featured two crowns, one at 4 00 for traditional time setting and winding and a second at 2 00 to wind and move a 12-hour disc which triggers the alarm function. Calibre 489 was replaced by [[JLC 814|Calibre 814]] after [[1958]].

The alarm hammer struck a protuberance on the back plate, making a distinctive buzzing sound. Even if the alarm was not wound, the hammer rattled freely against the protuberance.

Calibre 489 was also available with [[Parachoc]] [[shock protection]], called **Calibre P489**.

===== Calibre 601 =====
Introduced in [[1952]], **Calibre 601** is an extremely rare variant of Calibre 489. Serving as a transitional model, it has a single bridge covering the barrel and wheels. It is 1 mm wider than both the predecessor Caliber 489 and successor, [[JLC 814|Caliber 814]]. Fewer than 2,000 Calibre 601 movements and watches were produced.

The name, [[JLC 601|Calibre 601]], was also used in [[1982]] on the world's thinnest quartz movement from Jaeger-LeCoultre.

===== Specifications =====
  * 12.5 [[ligne]]s in diameter, 5.2 mm thick
  * [[Glucydur]] balance, automatically compensating flat [[hairspring]]
  * 18,000 A/h
  * [[Double barrel]] (time and alarm)
  * Direct sweep seconds
  * 17 [[jewel]]s
  * Alarm hammer inside case back


{{wst>template_jaeger-lecoultre_alarm_calibres}}

===== External Links =====
  * [[http://omegaforums.net/threads/a-little-potted-history-of-the-memovox-my-recently-acquired-cal-911.4480/|A Little Potted History Of The Memovox & My Recently Acquired Cal 911]]
  * [[http://www.adamvintage.com/jaeger-lecoultre-memovox.html|Three Cheers for Memovox!]]


{{tag>Movements Manual_winding_movements Jaeger-LeCoultre_calibres Jaeger-LeCoultre_Memovox_calibres Alarm_movements}}