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Movement
Jaeger-LeCoultre Calibre 381.
Important note regarding the power reserves
of the Calibre 381 Dual-Wing.
The Dual-Wing movement of the Duomètre
Quantième Lunaire watch model features two
barrels. The first barrel provides the watch’s
regulator (regulating organ) with 50 hours
of power reserve. The second barrel, which
is independent from the first, provides all the
watch’s functions with 50 hours of power
reserve. The functions, thus, do not cause any
loss of energy or isochronism in the escapement.
The regulator’s power reserve is indicated
by the blue triangle positioned between 7
and 8 o'clock. The functions’ power reserve
