====== JLC 177 ======
Calibre **JLC 177** is a [[tourbillon]] watch movement from [[Jaeger-LeCoultre]].

{{wst>image_cr|Jaeger-LeCoultre|Gyrotourbillon 1}}

Introduced in [[2004]] in their [[Jaeger-LeCoultre Master Gyrotourbillon 1|Master Gyrotourbillon 1]], this was the first appearance of the Jaeger-LeCoultre spherical tourbillon. It features two tourbillon carriages The outer carriage rotates every sixty seconds and carries an inner carriage with the balance wheel, balance spring, and escapement. This inner carriage rotates every 24 seconds, completing 2.5 turns per minute, exposing the 14 karat gold balance wheel once per minute. The entire tourbillon mechanism consists of 90 parts yet weighs just 1/3 gram thanks to aluminum and titanium construction.

Calibre 177 is impressive beyond the 2-axis tourbillon, however. It is a [[Grande Complication]] with [[perpetual calendar]], [[equation of time]], and four [[retrograde]] hands. The 177 is an [[hand-winding]] movement made up of 679 pieces. It runs at 21,600 vph, has [[two barrel]]s, 117 jewels, and a power reserve of 8 days.

This calibre was only ever used in the [[Jaeger-LeCoultre Master Gyrotourbillon 1]].

===== See also =====
  * [[JLC 174]]
  * [[Jaeger-LeCoultre Master Gyrotourbillon 1]]
  * [[Tourbillon]]


<WRAP ud ud_mov>

**Manufacturer:**
  * [[Jaeger-LeCoultre]]

**Description:**
  * [[Hand-winding]] movement
  * [[Double barrel]] [[tourbillon]] movement
  * 679 components

**Functions:**
  * Hour, minute, seconds
  * [[Retrograde]] [[power reserve indicator]]
  * [[Perpetual calendar]]
  * [[Equation of time]]
  * [[Retrograde]] date and month

**Data:**
  * H 11.32 mm
  * 117 [[jewels]]
  * 21,600 A/h
  * Power reserve 8 days

**Production period:**
  * [[2004]]
</WRAP>

{{tag>Movements Double_barrel_movements Perpetual_calendar_movements Manual_winding_movements Tourbillon_movements Grande_complication_movements Jaeger-LeCoultre_calibres Jaeger-LeCoultre_8_Days_calibres}}