====== A. Lange & Söhne Datograph Perpetual Tourbillon ======

{{wst>image_cr|A. Lange & Söhne|Datograph Perpetual Tourbillon (2016)|Datograph Perpetual Tourbillon (2016)}}
{{wst>image_cr|A. Lange & Söhne|Datograph Perpetual Tourbillon (2019)|Datograph Perpetual Tourbillon (2019)}}
{{wst>image_cr|A. Lange & Söhne|Datograph Perpetual Tourbillon Lumen (2024)|Datograph Perpetual Tourbillon "Lumen" (2024)}}
{{wst>image_cr|Lange|L952.2}}

The **Datograph Perpetual Tourbillon** is a luxury wristwatch by [[A. Lange & Söhne]].

This watch adds three major [[complication]]s to the functionality of the [[A. Lange & Söhne Datograph|Datograph]]: a [[flyback chronograph]] with precisely [[jumping]] minute counter, a [[perpetual calendar]] with [[moon phase display]], and a [[tourbillon]] with patented [[stop-second]].

The watch was first introduced [[2016]] with a platinum case and black dial; [[2019]] followed with a version in a white gold case with a red gold dial. In April [[2024]], Lange presented the "Lumen" version with a Lange-exclusive [[Honeygold]] case at [[Watches & Wonders]].

Lange counts this watch as part of the Saxonia family.

<WRAP ud ud_mod>
**Reference:**
  * 740.036 [[platinum]]
  * 740.056 [[white gold]]
  * 740.055FE [[Honeygold]] "Lumen"

**Movement:**
  * [[Manual winding]] movement [[Lange L952#L952.2|L952.2]], 18,000 A/h
    * Model "Lumen" with [[Lange L952#L952.4|L952.4]] 
  * [[Chronograph]] in classical [[column-wheel]] design with [[flyback]]
  * [[Big date]], [[small seconds]]
  * Precision adjustment: shock-resistant [[cam-poised balance]]
  * Plates and bridges in untreated [[nickel silver]]
  * [[Balance cock]] engraved by hand
  * Intermediary wheel cock and tourbillon bar engraved by hand
  * 59 [[jewels]], including 5 in screwed gold [[chaton]]s
  * 2 diamond capstones
  * Diameter: 32.6 mm; height: 9 mm
  * 729 components
  * Power reserve 50 hours

**Case:**
  * [[Platinum]] / 18 ct white gold
  * Ø 41.5 mm, height 14.6 mm
  * [[Sapphire crystal]]
  * Six-fold screwed [[sapphire crystal]] caseback

**Dial:**
  * Black / solid [[red gold]]
  * Appliques and indices in solid gold
  * Hands in [[rhodinated]]em gold and [[blued]] steel
  * Hours and minutes hands as well as hour indices at 3, 6, 9 and 12 o'clock coated with [[Superluminova]]

**Functions:**
  * Hours, minutes
  * [[Flyback chronograph]] with central 60-seconds counter and precisely [[jumping]] 30-minutes counter at 4 h 
  * [[Small seconds]] via tourbillon, patented [[hacking seconds]]
  * [[Moon phase indication]] at 6 h
  * [[Perpetual calendar]] with [[big date]], day of week, month, leap year
  * [[Day/night indicator]]
  * [[Power reserve indicator]] at 9/10 h
  * [[Tachymeter]] scale

**Bracelet:**
  * Black/dark brown Alligator leather strap, hand-sewn, with [[folding clasp]]

**Limited edition:**
  * 100 pieces
  * Honeygold "Lumen" 50 pieces

**Price:**
  * 285,000 € (white gold version, 2020)
</WRAP>

===== Video =====
  * [[https://www.youtube.com/watch?v=7CfelxTvKSQ|NOVELTY 2016: DATOGRAPH PERPETUAL TOURBILLON]], Youtube 2:44

{{tag>Watch_models Chronographs Watches_with_perpetual_calendar Watches_with_tourbillon A._Lange_&_Söhne_models A._Lange_&_Söhne_Datograph_models 
A._Lange_&_Söhne_Saxonia_models}}