The moonphase gets a lot of flak for being a “useless” complication. After all, how many people really need to know the phase of the moon on a given day? Especially when presented in a fairly abstract form on a watch dial?
And yet, a lot of watch enthusiasts love moonphases. I know I do. There’s a certain primeval romanticism that comes with having the nightly movements of our nearest celestial neighbor on one’s wrist. This feeling is only amplified when moonphase watches up the ante in some way to make their complication more impressive.
While basic mechanical moonphase watches require human intervention every 2.5 years to keep accurately tracking the moon’s 29.5-day cycle, “high-precision” moonphase watches have movements that can go over a century before needing any moonphase correction.
While this is already a comically long amount of time — the watch will need to be serviced many, many times before 100 years goes by, so the moonphase will need to be reset anyway — watchmakers remain unsatisfied, creating intervals many times longer just to show what they’re capable of.

The newest entry into this delightfully absurd subset of moonphase watches comes from H. Moser & Cie., which has fitted its Streamliner integrated sports watch with a special meteorite dial and a new version of its “Perpetual” moonphase movement that claims an accuracy of an astounding 1,027 years.





