====== A. Lange & Söhne Langematik Perpetual ======

{{wst>image_r|A_Lange_&_Söhne_Langematik-Perpetual_Platin|A. Lange & Söhne Langematik-Perpetual ([[platinum]]), Ref. 310.025\\ © A. Lange & Söhne}}
{{wst>image_r|A_Lange_&_Söhne_Langematik-Perpetual|A. Lange & Söhne Langematik-Perpetual ([[red gold]]), Ref. 310.032\\ © A. Lange & Söhne}}

{{wst>image_cr|A. Lange & Söhne|Langematik Perpetual Weißgold blau|Langematik Perpetual, white gold, blue dial}}
{{wst>image_cr|A. Lange & Söhne|Langematik Perpetual Rotgold blau|Langematik Perpetual, red gold, blue dial}}

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

The **Langematik Perpetual** is a luxury watch by [[A. Lange & Söhne]].

This is the world's first [[automatic]] [[wristwatch]] with [[perpetual calendar]], [[big date]] indicator and patented "Zero-reset", where the indications of the Calendar and of the [[moon phase]] both can be individually switched and also together by using the main [[pusher]]. Only on 28 February [[2100]], the display must be incremented manually by one day with a small pusher. The [[moon phase]] display is very precise Once set precisely, it differs after 122.6 years of continuous runtime only for one day of the synodic orbital period from.

The Langematik-Perpetual is available in 18ct [[red gold]] or in [[platinum]]. It is equipped with a hand-sewn crocodile leather strap or with an optional wave bracelet crafted by the finest goldsmiths. An insight into the unique [[self-winding]] [[manufacture]] movement [[Lange L922|L922.1]] SAX-0-MAT is obtained through the transparent sapphire back.

Introduced in [[2004]], the Langematik Perpetual was produced in many different case and dial combinations, but all measure 38.5 mm in diameter, 10.2 mm thick, and have a sapphire caseback to view the beautiful [[Lange L922|Cal. L922.1]] movement. Ref. 310.021 (310.221 with bracelet) has a yellow gold case and champagne dial, Ref. 310.032 (310.232 with bracelet) has a pink gold case and silver dial, Ref. 310.025 (310.225 with bracelet) has a platinum case and rhodium dial, Ref. 310.047 has a pink gold case and black dial, and Ref. 310.026 has a white gold and black dial.

[[2021]] appeared a limited edition of 50 pieces each in white gold and red gold, respectively, with a blue dial.

<WRAP ud ud_mod>
**Reference:**
  * 310.032 [[red gold]]
  * 310.232 [[red gold]], bracelet in red gold
  * 310.025 [[platinum]]
  * 310.225 [[platinum]], platinum bracelet
  * 310.028 [[white gold]], blue (2021)
  * 310.037 [[red gold]], blue (2021)

**Movement:**
  * [[Manufacture movement]] [[Lange L922|L922.1]], 21,600 A/h
  * SAX-0-MAT, [[automatic]] winding
  * Bi-directional winding embossed "three-quarter rotor" in 21ct gold and [[platinum]] with 4 ball bearings in the change gear 
  * [[Perpetual calendar]] with [[moon phase]] indication and [[big date]]
  * Patented [[Zero-reset]]
  * [[Glucydur]] [[screwed balance]], [[Nivarox hairspring]] with [[swan-neck precision regulator]]
  * Beat adjustment with micrometer screw
  * [[Bridge]]s with [[Glashütte ribbing]]
  * [[Balance cock]] engraved by hand
  * 43 [[jewels]]
  * 478 components
  * Power reserve 46 hours

**Case:**
  * 18ct [[yellow gold]], [[white gold]], [[red gold]], or [[platinum]]
  * Ø 38.5 mm, height 10.2 mm
  * [[Sapphire crystal]]
  * Caseback secured with six screws, with [[sapphire crystal]]

**Dial:**
  * Solid silver, champagne (red gold version) or [[rhodinated]]
  * //310.028/310.037:// Solid silver, blue, with embossed groove structure
  * All appliques made of solid gold
  * Lancet hands in [[gold]], covered with [[Superluminova]]

**Functions:**
  * Hours, minutes
  * [[Small seconds]] with [[stop-second]] and [[zero-reset]] at 6 h
  * [[Big date]]
  * [[Perpetual calendar]] with date, day of the week, month, [[moon phase]] and leap-year displays
  * [[Day/night indicator]]

**Bracelet:**
  * Crocodile leather strap with [[tang-type buckle]], or bracelet in [[gold]] or platinum
</WRAP>

===== Video =====
  * [[A. Lange & Söhne Langematik-Perpetual Video]], 4 00

{{tag>Watch_models Watches_with_perpetual_calendar Watches_with_moon_phase A._Lange_&_Söhne_models}}