====== A. Lange & Söhne Grand Langematik ======
{{wst>image_r|A_Lange_&_Söhne_Große_Langematik|A. Lange & Söhne Grand Langematik, Ref. 309.021}}
{{wst>image_r|Lange_L921.4|Calibre L921.4}}
{{wst>image_r|A_Lange_&_Söhne_Große_Langematik_Rotgold|A. Lange & Söhne Grand Langematik ([[red gold]]), Ref. 309.025}}
{{wst>image_r|A_Lange_&_Söhne_Große_Langematik_Platin|A. Lange & Söhne Grand Langematik ([[platinum]]), Ref. 309.031}}
**Große Langematik (Grand Langematik)** is a luxury watch by [[A. Lange & Söhne]].

===== History =====
This watch complements the [[1997]] lauched [[A. Lange & Söhne Langematik|Langematik]], long considered a classic, with the Lange-typical patented [[big date]]. It has a 40 mm diameter case, larger than the [[A. Lange & Söhne Langematik|Langematik]]. Both are equipped with the [[self-winding]] [[manufacture]] movement [[Lange L921.4|L921.4]]. 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 Grand Langematik was introduced in [[2003]] and produced through [[2007]]. References include the yellow gold/champagne 309.021, pink gold/black 309.031, and platinum/rhodium 309.025.


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**Reference:**
  * 309.021 ([[yellow gold]]), 309.025 ([[platinum]]), 309.031 ([[red gold]], black dial)

**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]]/[[platinum]]
  * Ø 40 mm, height 9.7 mm
  * [[Sapphire crystal]]
  * Screwed down caseback with six screws and with [[sapphire crystal]]

**Dial:**
  * Dial in solid silver champagne colored/black applied indexes in [[gold]]
  * Lancet hands in [[yellow gold]]/[[white gold]], [[rhodinated]], with tritium coverage

**Functions:**
  * Hours, minutes, [[small seconds]] at the 6
  * [[Hacking seconds]] device with automatic zeroing 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]]

**Price:**
  * From 19.400.- € [[RRP]] (2007)
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{{tag>Watch_models A._Lange_&_Söhne_models}}