Duomètre Heliotourbillon Perpetual Pink Gold / Silver

In Context

At 44 mm it is a large watch — well above this catalogue’s 40 mm median, and enough to dominate a narrow wrist. At 14.7 mm it is a tall case, and it will catch on a cuff. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. 50 m covers rain and hand-washing comfortably; it is not a watch to swim in.

The movement is hand-wound, so winding it becomes part of the day rather than something the watch does for you. 50 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 21,600 vph the seconds hand advances 6 times a second, the slower and more audible rate of an older design.

Q6202420 stands on its own in this catalogue — no other reference here shares its base number. It pairs a silver dial with a pink gold case. It was a limited edition.

The Jaeger-LeCoultre Calibre 388 is a hand-wound movement developed and manufactured in-house, based on the patented Duometre concept with two independent gear trains—one dedicated to timekeeping, the other to complications—linked by a single escapement for uncompromised precision. Its most striking feature is the Heliotourbillon: a triple-axis tourbillon composed of 163 components and weighing less than 0.7 grams, rotating in a dynamic motion to enhance chronometric performance and visual spectacle. Calibre 388 incorporates a perpetual calendar with a grande date, moon phase, day/night indicator, and leap year display, alongside dual power reserve indicators. It runs at a frequency of 28,800 vibrations per hour (4 Hz), offers a power reserve of approximately 46 hours, and consists of 655 components including 89 jewels. The movement measures 34.3 mm in diameter and 11.15 mm in height.