====== JLC 938 ======
**Calibre 938** is a thin automatic watch movement with [[power reserve indicator]] from [[Jaeger-LeCoultre]].

Cal. 938 appeared around [[2000]] and eventually replaced the similar [[JLC 928|Cal. 928]], carrying the standard for one of Jaeger-LeCoultre's signature complications, the [[Jaeger-LeCoultre Réserve de Marche|Réserve de Marche]], or [[power reserve indicator]]. The company was the first to bring this [[complication]] to market in [[1948]] with the [[JLC 481|Cal. 481]] [[Jaeger-LeCoultre Powerwind|Powerwind]] and has continued to market watches with this complication to today.

Cal. 938 an [[automatic]] movement made up of 273 components. It runs at 28,800 A/h, has 41 jewels, and a power reserve of 43 hours. It features central hour and minute hands and [[small seconds]] at 6 00. A subdial at about 2 30 shows the [[date by pointer]].

But it is the [[retrograde]] [[power reserve indicator|power reserve pointer]] centered at 10 30 that gives the movement its claim to fame. It swings counter-clockwise from about 6 30 to about 4 00 and features a scale marked "0 - 10 - 20 - 30 - 40" and the "Réserve de Marche" title.

Jaeger-LeCoultre currently uses this calibre in a single watch model, the [[Jaeger-LeCoultre Master Ultra Thin Réserve de Marche]]. Cal. 938/1 is substantially similar.

Cal. 938 improves on the previous [[JLC 928|Cal. 928]] with a [[free-sprung balance]], [[ceramic]] bearings, and an improved uni-directional winding system.


<WRAP ud ud_mov>
**Description:**
  * [[Automatic]] movement
  * Uni-directional winding (counter-clockwise)
  * 273 components

**Functions:**
  * Central hour and minute hands
  * [[Small seconds]]
  * [[Date by pointer]]
  * [[Power reserve indicator]]

**Data:**
  * H 4.90 mm
  * 41 [[jewels]]
  * 28,800 A/h
  * Power reserve 43 Hours

**Production period:**
  * Predecessor [[JLC 928|Cal. 928]]
  * [[2000]]-Current
</WRAP>

{{tag>Movements Automatic_movements Jaeger-LeCoultre_calibres}}