Overseas Moon Phase Retrograde Date Stainless Steel / Blue

In Context

At 41 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. At 10.48 mm thick it is about average for a modern wristwatch. 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 winds itself from the motion of your wrist. 40 hours of reserve carries it overnight, but not through a weekend in a drawer. At 28,800 vph the seconds hand advances 8 times a second.

4000V/210A-B911 stands on its own in this catalogue — no other reference here shares its base number. It pairs a blue sunburst dial with a stainless steel case. Beyond the time it carries a moon phase.

This 275-component movement can be admired through the sapphire caseback, notably the circular-grained surface of its mainplate and its 22K gold oscillating weight adorned with a stylised compass rose recalling the themes travel and exploration. The moon phases are displayed through a 6 o'clock aperture graduated from 0 to 29½ and thus serving to read off the number of days elapsed since the last new moon. This complication, known as the age of the moon, corresponds to the actual cycle of this heavenly body which completes one full rotation around the Earth in exactly 29 days, 12 hours and 45 minutes. The precision moon-phase mechanism requires a one-day correction only every 122 years. The retrograde date indication by central hand occupies the upper part of the dial. For enhanced user-friendliness, all adjustments are done via the crown: winding, correction of the date and moon phases, as well as setting the time.