====== Lange L031 ======

{{wst>image_cr|Lange|L031.1}}

**Lange L031.1** is a [[A. Lange & Söhne]] movement.

[[Manufacture]] [[hand-wound]] caliber with three-day [[power reserve]], [[double barrel]], [[big date]], four screwed gold chatons, the [[screw balance]] with [[swan neck fine adjustment]] and hand-engraved balance cock. 

Used in the [[A. Lange & Söhne Lange 1 Zeitzone|Lange 1 Zeitzone]] model.

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**Description:**
  * [[Manual winding]] movement  
  * [[Double barrel]]
  * [[Plate]]s and [[bridge]]s in untreated [[nickel silver]]
  * [[Balance cock]] and intermediate-wheel cock engraved by hand
  * [[Glucydur]] [[screw balance]], [[Nivarox]] [[balance spring]], [[swan's neck fine regulation]] and patented beat adjustment mechanism

**Functions:**
  * Home time with [[day/night indicator]] (hours, minutes, [[small seconds]] with [[hacking seconds]]), zone time (hours, minutes) with day/night indicator and city ring
  * [[Big date]] for the home time
  * [[Power reserve indicator]]

**Data:**
  * Ø 34.1 mm, height 6.65 mm
  * 54 [[jewels]], including 4 in screwed gold [[chaton]]s
  * 21,600 A/h
  * 417 components
  * Power reserve 72 h

**Production period:**
  * From [[2005]]
</WRAP>

{{tag>Movements Manual_winding_movements Dual_timezone_movements A._Lange_&_Söhne_calibres}}