Image courtesy of Jaeger-LeCoultre, official product page · Reference is out of current collection per JLC’s own site; image is JLC’s official product photography for this exact ref.
Duomètre
JLC’s "Dual-Wing" architecture: two independent gear trains, one for timekeeping and one for the complication, resynchronized by the crown rather than sharing a single power source. The Quantième Lunaire adds a moonphase to the base going-train/complication-train split; Cal. 381 (manual-wind, 50h) is the line’s core movement.
