====== A. Lange & Söhne Richard Lange Perpetual Calendar “Terraluna“ ======

{{wst>image_cr|A. Lange & Söhne|Richard Lange Ewiger Kalender „Terraluna“ Rotgold|Richard Lange Perpetual Calendar “Terraluna“, Red gold}}
{{wst>image_cr|A. Lange & Söhne|Richard Lange Ewiger Kalender „Terraluna“ Weißgold|Richard Lange Perpetual Calendar “Terraluna“, white gold}}

{{wst>image_cr|Lange|L096.1}}
{{wst>image_cr|Lange|L096.1 Zifferblattseite|L096.1, dial side}}

**Richard Lange Perpetual Calendar “Terraluna“** is a luxury wristwatch by [[A. Lange & Söhne]].

Introduced in [[2014]], the name of this watch refers to the vivid display of the position of the moon in relation to the earth and the sun.

The orbital moon phase display shown on the back uses three solid white gold discs to show not only the instantaneous phase of the moon but, patent pending, the respective constellation of the moon, earth and sun. It is so precise that it only needs to be corrected by one day after 1,058 years.

In addition, the Richard Lange Perpetual Calendar “Terraluna“ has a [[perpetual calendar]] with [[big date]], display of the day of the week, month, leap year and time of day with [[small seconds]]. The displays are [[jumping]], which increases readability.
The [[double barrel]] with [[constant force]] mechanism ensures a constant power supply with a high power duration of 14 days (336 hours).

<WRAP ud ud_mod>
**Reference:**
  * 180.026 [[white gold]]
  * 180.032 [[red gold]]

**Movement:**
  * [[Manual winding]] [[manufacture movement]] [[Lange L096|L096.1]], 21.600 A/h
  * Precision adjustment: [[screw balance]]
  * [[Double barrel]] with [[constant-force]] mechanism
  * [[Perpetual calendar]]
  * 80 [[jewels]], including 2 in screwed gold [[chaton]]s
  * Diameter: 37.3 mm; height: 11.1 mm
  * 787 components
  * Power reserve 14 days (336 hours)

**Case:**
  * 18 ct [[white gold]] or [[red gold]]
  * Ø 45.5 mm, height 16.5 mm
  * [[Sapphire crystal]]
  * Caseback with [[sapphire crystal]] sighting window

**Dial:**
  * Solid silver, argenté
  * [[Regulator]] dial

**Functions:**
  * Decentral big minutes at 12 h
  * Decentral small hours at 4/5 h
  * [[Small seconds]] with [[hacking seconds]] at 7/8 h
  * [[Perpetual calendar]] with [[big date]] at 12 h
  * Day of week at 8 h
  * Month at 4 h
  * Leap year indication at 2/3 h
  * [[Power reserve indicator]] at 6
  * Retrograde orbital [[moon phase indication]] with [[day/night indicator]] for the northern hemisphere

**Bracelet:**
  * Crocodile leather strap
</WRAP>

===== Video =====
  * [[https://youtu.be/r4UXKjw6lt0|Der Präzision verpflichtet: RICHARD LANGE EWIGER KALENDER „Terraluna“ – A. Lange & Söhne]], Youtube, 3:31

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