====== Lange L922 ======

{{wst>image_cr|Lange|L922.1}}
{{wst>image_cr|Lange|L922.1_ZB|Lange L922.1, dial side}}

**Lange L922.1** is an [[automatic]] caliber by [[A. Lange & Söhne]].

The movement features a [[perpetual calendar]] with [[moon phase indicator]] and [[big date]]. It is used in the [[A. Lange & Söhne Langematik Perpetual|Langematik Perpetual]] model.

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**Description:**
  * [[Manufacture]] movement SAX-0-MAT
  * [[Escapement]]: stone lever
  * Bi-directional winding embossed "three-quarter rotor" in 21ct gold and [[platinum]] with 4 ball bearings in the change gear 
  * Patented Zero-reset
  * Hand-engraved [[balance cock]] with [[swan's neck fine regulation]]
  * [[Glucydur]] [[screw balance]] with [[hacking seconds]], [[Nivarox]] [[balance spring]]
  * Beat adjustment with micrometer screw
  * Glashütte [[Three-quarter plate]] in untreated Nickel silver
  * [[Bridge]]s with [[Glashütte ribbing]]
  * All edges in the movement [[chamfered]] and polished

**Functions:**
  * Hours, minutes
  * [[Small seconds]] at 6 h
  * [[Big date]]
  * [[Perpetual calendar]] with moon phase indication

**Data:**
  * ∅ 30.4 mm, H 5.4 mm
  * 21,600 A/h
  * 43 [[jewels]], including 4 in screwed gold [[chaton]]s
  * 478 components
  * Power reserve 46 h

**Production period:**
  * From [[1997]]
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{{tag>Movements Automatic_movements A._Lange_&_Söhne_calibres}}