====== Jaeger-LeCoultre 8 Days ======
{{wst>image_cr|Jaeger-LeCoultre|Reverso Grande Date RS|Jaeger-LeCoultre Reverso Grande Date (back)}}

[[Jaeger-LeCoultre]] has produced long-reserve watch movements since [[1919]], culminating with the **8 Days** series of watches introduced in the 2000's.

===== History =====
The first [[8-day]] power reserve Jaeger-LeCoultre watch was introduced in [[1919]]. [[JLC 144|Calibre 144]] measured 38.35mm in diameter and was used in a number of pocket watches. In [[1928]], Jaeger-LeCoultre introduced [[JLC 134|Calibre 134]], an 8-day [[alarm]] movement measuring 27.07 mm in diameter. A [[minute repeater]] was introduced the next year, measuring 29.33 mm in diameter.

In [[1931]], Jaeger-LeCoultre introduced the most famous classic 8 day movement, [[JLC 124|Calibre 124]]. It was a rectangular movement measuring 27.07 mm by 20.30 mm and it set the stage for the modern series of movements. This was the template used by the Jaeger-LeCoultre team when they started developing an [[8 days movement]] for the [[Jaeger-LeCoultre Reverso Septantieme]] in [[1997]].

===== Reverso 8 Days =====
To celebrate the company's 70th birthday in [[2002]], Jaeger-LeCoultre introduced the [[Jaeger-LeCoultre Reverso Septantième]], featuring the all-new [[JLC 879|Calibre 879]]. This was a major advancement over Calibre 124, with nearly every component changed but the original design retained. The movement was designed with some flexibility in mind, and a family of 8 day [[Reverso]] models soon followed.

  * [[JLC 879|Calibre 879]] (2002) - [[Moon phase]], small seconds, date, [[power reserve]]
  * [[JLC 874|Calibre 874]] (2003) - Small seconds, jumping power reserve on rear
  * [[JLC 875|Calibre 875]] (2003) - Small seconds, date, power reserve
  * [[JLC 873|Calibre 873]] (2004) - Day/night, small seconds/moon phase, power reserve
  * [[JLC 878|Calibre 878]] (2004) - Day/night, small seconds, date; Reverse power reserve, 24-hour, GMT

===== Master Eight Days =====
{{wst>image_cr|Jaeger-LeCoultre|Master Eight Days Perpetual SQ Platin|Jaeger-LeCoultre Master Eight Days Perpetual SQ Platinum}}

Jaeger-LeCoultre later created a round version of the [[8 days movement]] for the Master series of watches.

  * [[JLC 877|Calibre 877]] (2003) - Day/night, small seconds, date, power reserve
  * [[JLC 876|Calibre 876]] (2004) - [[Perpetual calendar]], date, month, day/moon phase, year, day/night, power reserve
  * [[JLC 177|Calibre 177]] (2004) - [[Tourbillon]], power reserve, perpetual calendar, equation of time, date, month


{{tag>Jaeger-LeCoultre Jaeger-LeCoultre_calibres Jaeger-LeCoultre_8_Days_calibres}}