====== A. Lange & Söhne Lange 1 Tourbillon Perpetual Calendar ======
{{wst>image_cr|A. Lange & Söhne|Lange 1 Tourbillon Ewiger Kalender|A. Lange & Söhne Lange 1 Tourbillon Perpetual Calendar (red gold)}}
{{wst>image_cr|A. Lange & Söhne|Lange 1 Tourbillon Ewiger Kalender Platin|A. Lange & Söhne Lange 1 Tourbillon Perpetual Calendar (platinum)}}

{{wst>image_cr|Lange|L082.1}}
{{wst>image_cr|Lange|L082.1 Zifferblattseite|Lange L082.1 dial side}}

**Lange 1 Tourbillon Perpetual Calendar** is a luxury wristwatch by [[A. Lange & Söhne]].

The watch is an evolved version of the famous [[Lange 1]] model, combining two sophisticated [[complications]], the [[tourbillon]] and the [[perpetual calendar]]. The characteristic decentralized dial design of the Lange 1 has been retained and subtly enhanced so that it does not look cluttered and remains easy to read.

Contributing to this is the new, patent-pending invention of the month display via an external rotating ring.

All displays of the perpetual calendar -- [[big date]], [[retrograde]] day of the week,
month ring, [[leap year]] and [[moon phase indication]] -- advance [[jumping]] and are thus easily readable at any time.

In order not to disturb the dial design, an opening for viewing the tourbillon was omitted (until now, an understatement philosophy known almost only from [[Patek Philippe]]). This can be admired through the glass back. It should also be mentioned that the tourbillon can be stopped with a patented, extremely practical [[stop-second]] mechanism to precisely set the seconds indication.

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**Reference:**
  * 720.025 [[platinum]]
  * 720.032 [[red gold]]

**Movement:**
  * [[Self-winding]] [[manufacture movement]] [[Lange L082|L082.1]], 21,600 A/h
  * Central element of the unidirectional winding rotor in 21 ct Gold with weight segment in platinum
  * [[Tourbillon]]
  * 68 [[jewels]]
  * 6 screwed gold [[chaton]]s, one diamond capstone
  * 624 components
  * Power reserve 50 hours

**Case:**
  * [[Platinum]] or 18 ct [[red gold]]
  * Ø 41.9 mm, height 12.2 mm
  * [[Sapphire crystal]]
  * Caseback with [[sapphire crystal]] sighting window

**Dial:**
  * Solid [[silver]], rhodié / argenté

**Functions:**
  * Hours, minutes, [[small seconds]]
  * Tourbillon with patented [[hacking seconds]]
  * [[Perpetual calendar]] with [[big date]], day of week, month and leap year (all indications [[jumping]])
  * [[Day-/night indication]]
  * [[Moon phase indication]]

**Bracelet:**
  * Crocodile leather strap with [[folding clasp]]

**Limited edition:**
  * 100 pieces ([[platinum]])
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{{tag>Watch_models Watches_with_tourbillon Watches_with_perpetual_calendar A._Lange_&_Söhne_models A._Lange_&_Söhne_Lange_1_models}}