====== A. Lange & Söhne Langematik Big Date ======
{{wst>image_r|A_Lange_&_Söhne_Langematik_Großdatum|A. Lange & Söhne Langematik Big Date, Ref. 308.021}}
{{wst>image_r|Lange_L921.4|Calibre L921.4}}
{{wst>image_r|A_Lange_&_Söhne_Langematik_Großdatum_Platin|A. Lange & Söhne Langematik Big Date (platinum), Ref. 308.025}}
{{wst>image_r|A_Lange_&_Söhne_Langematik_Großdatum_Weißgold|A. Lange & Söhne Langematik Big Date (white gold), Ref. 308.027}}
{{wst>image_r|A_Lange_&_Söhne_Langematik_Großdatum_Rotgold|A. Lange & Söhne Langematik Big Date (red gold), Ref. 308.031}}
The **Langematik Big Date** is a luxury watch by [[A. Lange & Söhne]].

This watch complements the [[1997]] launched, long considered as classics [[A. Lange & Söhne Langematik|Langematik]] with the Lange-typical patented [[big date]]. The watch is equipped with the [[self-winding]] [[manufacture]] movement [[Lange L921.4|L921.4]]. Also this SAX-O-MAT calibre has [[hacking seconds]] with automatic zeroing of the seconds hand ("zero-reset") when pulling the crown. The power reserve is 46 hours. The watch is available in many variants in [[yellow gold|yellow]] or [[red gold]], or in [[platinum]] as well as with various dial colors.


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**Reference:**
  * 308.021 ([[yellow gold]]), 358.021 ([[yellow gold]], bracelet aus [[yellow gold]]), 308.025 ([[platinum]]), 358.025 ([[platinum]], bracelet aus Platin), 308.027 ([[white gold]], black dial), 358.027 ([[white gold]], bracelet in white gold), 308.032 ([[red gold]])

**Movement:**
  * [[Self-winding]] movement [[Lange L921.4|L921.4]] «SAX-O-MAT», 21,600 A/h
  * 45 [[jewels]]
  * [[Glucydur]] [[screwed balance]], [[Nivarox hairspring]] with [[swan-neck precision regulator]]
  * Beat adjustment with micrometer screw
  * Bi-directional winding embossed «Three Quarter Rotor» in 21ct Gold and [[platinum]] with 4 ball bearings in the gear change
  * Power reserve 46 hours
  * [[Bridge]]s with [[Glashütte ribbing]]

**Case:**
  * 18ct [[yellow gold]] / [[white gold]] or [[platinum]]
  * Ø 37 mm, height 9.7 mm
  * [[Sapphire crystal]]
  * Screwed down caseback with six screws and with [[sapphire crystal]]

**Dial:**
  * Dial in solid silver champagn/black/[[rhodinated]], applied indexes in [[gold]]
  * Lancet hands aus [[yellow gold]]/[[white gold]], [[rhodinated]], with Tritium covering

**Functions:**
  * Hours, minutes, [[small seconds]] at the 6
  * [[Hacking seconds]] device with automatic zeroing of the seconds hand ("zero reset") when pulling the crown
  * [[Corrector]] for [[date display]] on the side of the case

**Bracelet:**
  * Crocodile leather strap with [[tang-type buckle]]
  * Versions with Ref. 358... handmade bracelet in 18ct [[yellow gold]]/[[white gold]]/[[platinum]]

**Price:**
  * From 15.952,- € [[RRP]] (retrieved 2007)
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{{tag>Watch_models A._Lange_&_Söhne_models}}