Duomètre Sphérotourbillon Moon

In Context

At 42 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. At 14.3 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.

6086520 stands on its own in this catalogue — no other reference here shares its base number. It pairs a silver dial with a white gold case.

Mechanical manual winding movement, 476 parts, 21,600 vibrations per hour, 2 barrels each with 45-hour power-reserve. Functions: local hour, minute, small seconds with flyback, moon phases, 24-hour reference time, flying tourbillon with cylindrical balance-spring, power-reserve for the regulating organ, powerreserve for the functions.

1 other watch in the library runs the Jaeger-LeCoultre 389.

Jaeger-LeCoultre

Duomètre Sphérotourbillon Moon Platinum / Silver

6086420 · 42 mm