====== Jaeger-LeCoultre Master Calendar ======
{{wst>image_cr|Jaeger-LeCoultre|Master Calendar Rotgold}}

{{wst>image_cr|Jaeger-LeCoultre|Master Calendar}}

**Master Calendar** is a wristwatch by [[Jaeger-LeCoultre]].

This model in the series [[Master Control]] has a [[hand date]] display, a day and month window, a highly accurate [[moon phase]], and [[power reserve indicator]].

===== References =====
Jaeger-LeCoultre has produced many different Master Calendar watches to date.

  * Case number 140, 37 mm diameter
    * [[Jaeger-LeCoultre Master Moon|Master Moon]] [[JLC 891|891/448 or 891/2/440]] - steel (140.8.98), red gold (140.2.98)
    * [[Jaeger-LeCoultre Master Control Calendar|Master Control Calendar]] [[JLC 891|Cal. 891/977 or 891/447]] - steel (140.8.87), white gold (140.3.87), yellow gold (140.1.87)
  * Case number 147, 40 mm diameter
    * [[Jaeger-LeCoultre Master Calendar 924|Master Calendar]] [[JLC 924|Cal. 924]] - steel (147.8.41), rose gold (147.2.41)
  * Ref. 151, 40 mm diameter
    * [[Jaeger-LeCoultre Master Calendar 151|Master Calendar, Ref. 151]] (20xx-2013) [[JLC 924|Cal. 924]] - steel (Q151842A), rose gold (Q151242A)
  * Ref. 155, 39 mm diameter
    * [[Jaeger-LeCoultre Master Calendar 155|Master Calendar, Ref. 155]] (2014-) [[JLC 866|Cal. 866]] - steel (Q1558420), steel/meteorite dial (Q1558421), rose gold (Q1552520), rose gold/meteorite dial (Q1552540)
  * Ref. 126, 39 mm diameter
    * [[Jaeger-LeCoultre Master Ultra Thin Calendar|Master Ultra Thin Calendar, Ref. 126]] (2013-) [[JLC 891|Cal. 891/2-448]] - steel (Q1263520)


<WRAP ud ud_mod>

**Movement:**
  * [[Self-winding]] [[manufacture]] movement [[JLC 924]], 28,800 A/h
  * 43 hours power reserve
  * 339 components
  * 41 [[jewels]]

**Case: **
  * 18ct [[red gold]] or [[stainless steel]]
  * Ø 40.5 mm, H 13 mm
  * [[Domed]] [[sapphire crystal]] with [[anti-glare treatment]]
  * [[Sapphire crystal]] caseback
  * [[Waterproof]] to 50 m

**Dial:**
  * Silvered
  * Steel version [[solar grinding]], [[rhodinated]] indexes

**Functions:**
  * Hours, minutes, [[small seconds]]
  * [[Hand date]], day of week, month
  * [[Moon phase]] with total precision over a period of 122 years
  * Power reserve

**Bracelet: **
  * Brown Alligator leather strap with double [[folding clasp]] or [[stainless steel]] bracelet
</WRAP>

{{tag>Watch_models Watches_with_moon_phase Jaeger-LeCoultre_models}}