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Pre-Owned Jaeger-LeCoultre Duomètre Quantième Lunaire (Q6042421) Housed in a warm 40.5mm 18K rose gold case, this piece represents a milestone in modern mechanical watchmaking, introducing the revolutionary Dual Wing concept to eliminate the compromise between chronometric precision and high-drain complications. At the heart of this masterpiece beats the manually wound Caliber 381, featuring a Dual Wing architecture with two independent power supplies linked to a single, shared regulating organ. Barrel 1 is dedicated entirely to the precision of timekeeping, barrel 2 powers the complications (calendar, moon phase, and foudroyante) and the crown winding clockwise powers the timekeeping mechanism; winding counter-clockwise supplies the complications. The dial is finished in a grained silvered-gray texture staring a mesmerizing Foudroyante (flying seconds) hand, darting in crisp, lightning-fast 1/6th-of-a-second increments at the 6 o'clock position and a masterfully integrated moon phase and date indicator at the 10 o'clock position. This piece is fitted on a brown alligator strap and is secured on an 18k rose gold deployant buckle. Functions include hours, minutes, seconds, date, moon phase and power reserve indicator. This watch comes with the original papers. We back this watch with a 2-Year warranty by For Him! This watch will be ready to ship in 5-7 days! Verified details include metal of 18K rose gold and measurement of 40.5mm.