JLC 380

File:JLC 380.jpg

Calibre JLC 380 'Dual-Wing'

The JLC 380 is a watch movement from Jaeger-LeCoultre.

Introduced at SIHH in 2007 along with the Duomètre à Chronographe, "Dual-Wing" calibre 380 is unusual in that it features two barrels and two independent gear trains, joined by a single escapement and balance. One barrel and gear train powers the time display while the second powers the chronograph complications. The chronograph features Seconde Foudroyante in a 6:00 subdial, allowing measurement to one sixth of a second. Unusually, the time display is placed in a 10:00 subdial, with the chronograph time at 2:00. This corresponds to the two barrels of the movement. Two seconds hands are central and use the main dial, one each for time and chronograph. Dual power reserve indicators complete the complications. The barrels are wound independently by the crown: Clockwise for timekeeping and counter clockwise for the chronograph.

The JLC 380 is an extra-flat manual winding chronograph movement with, 21,600 A/h, 48 jewels, screwed balance with gold weight screws, Incabloc shock protection, and 50 hour power reserve. It is made up of 445 pieces. It is related to the "Grande Complication" JLC 182 movement, perhaps the most complex ever made to that point.

Applications

Jaeger-LeCoultre currently uses this calibre in the Jaeger-LeCoultre Duomètre à Chronographe.

External Links

• A Twin Engined Chronograph: the Jaeger LeCoultre Duomètre

Manufacturer: Jaeger-LeCoultre Description: Manual winding movement Escapement: Stone lever Yoke winding system Flat hairspring Two independent barrels Incabloc shock protection Screwed balance with gold weight screws 445 components Functions: Hour/minute hands Small seconds Double barrel design with dual power reserve meters Chronograph with hour counter, 30-minute counter, and 60-second counter Seconde Foudroyante Minute-unit indicator Data: 15 lignes D 33.7 mm, H 6.95 mm 48 jewels 21,600 A/h Power reserve 50h Extras: Spot-polished top plate, sunburst Geneva stripes centered on the balance wheel, grained and angled levers Production period: Since 2007