====== Lange L931 ======

===== L931.3 =====
{{wst>image_cr|Lange|L931.3}}

**Lange L931.3** is a caliber by [[A. Lange & Söhne]].

[[Hand-wound]] [[manufacture]] [[form movement]] with [[small seconds]] and [[big date]].

Used in the [[A. Lange & Söhne Cabaret]] model.

<WRAP ud ud_mov>
**Description:**
  * [[Hand-winding]] [[form movement]]
  * [[Big date]], [[small seconds]] with [[hacking seconds]]
  * [[Glucydur]] [[screw balance]], [[Nivarox]] [[balance spring]] with [[swan's neck fine regulation]]
  * Beat adjustment via micrometer screw for index adjustment
  * Glashütte [[three-quarter plate]], bridges with Glashütte stripes

**Functions:**
  * Hours, minutes, [[small seconds]] at 6 h
  * [[Hacking seconds]]
  * [[Big date]] at 12 h
  * [[Corrector]] for [[date display]] at the side of the case

**Data:**
  * 21,600 A/h
  * 30 [[jewels]], including 3 in screwed gold [[chaton]]s
  * Power reserve 42 hours
</WRAP>

===== L931.5 =====
{{wst>image_cr|Lange|L931.5_ZB|Calibre L931.5, dial side}}

**Lange L931.5** is the version of the L931 with [[moon phase]].

Used in the [[A. Lange & Söhne Cabaret Moonphase|Cabaret Moonphase]] model.

<WRAP ud ud_mov>
**Data:**
  * 31 [[jewels]]
  * [[Big date]], [[small seconds]], [[moon phase]]
  * 268 components
  * Power reserve 42 hours
</WRAP>

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