====== Lange L1902 ======

{{wst>image_cr|Lange|L1902}}

The **Lange L1902** is a [[hand-wound]] movement with large and small chimes, [[minute repeater]], [[rattrapante chronograph]] function and [[perpetual calendar]] from [[A. Lange & Söhne]].

It is used in the [[A. Lange & Söhne Grand Complication|Grand Complication]] model. Only a total of six examples of this watch and movement were produced as of [[2013]], one in each year.

<WRAP ud ud_mod>
**Description:**
  * [[Manual winding]] [[manufacture movement]]
  * [[Rattrapante chronograph]] with [[column-wheel]] control
  * [[Perpetual calendar]]
  * [[Repetition]]
  * [[Plate]]s and [[bridge]]s in untreated [[nickel silver]]
  * NIVAROX-1 [[flat hairspring]] from in-house production
  * [[Glucydur]] [[screw balance]]
  * Three [[barrel]]s (time, chime, chronograph)
  * Shock protection
  * [[Balance cock]] engraved by hand
  * Edges im movement [[chamfered]] and polished

**Functions:**
  * Hours, minutes, [[small seconds]] with [[hacking seconds]]
  * [[Chronograph]] seconds, 30-minutes counter, [[rattrapante]] hands
  * [[Seconde foudroyante]]
  * [[Perpetual calendar]] with date, day of week, month, leap year, [[moon phase indication]]
  * Repetition with [[repetition#strike_sequences|Petite and Grand Sonnerie]]

**Data:**
  * ∅ 40.5 mm; H 14.2 mm
  * 18,000 A/h
  * 67 [[jewels]], including 7 in screwed gold [[chaton]]s
  * 876 components
  * Power reserve 30 h
</WRAP>

{{tag>Movements Manual_winding_movements Chronograph_movements Rattrapante_chronograph_movements Perpetual_calendar_movements Minute_repeater_movements Grande_complication_movements A._Lange_&_Söhne_calibres}}