Complications - the Moon Phase

The complication on a watch that reads the position of the moon in its phase of waxing and waning is the Moon Phase Complication. And an actual moon phase - that is from full moon to full moon-  is 29.5 days. Or to be exact 29.5 days, 12 hours, 44 minutes and 2.9 seconds. Behind the dial of a typical moonphase watch is a disc with two identical moons on it. Completing a cycle every 29.5 days with the waxing and waning face of the moon accounted for by the curved aperture window. One of the most whimsical and artistic complications, originally generated by a gear wheel inside your watch with 59 teeth, it advanced by one ‘tooth’ a day, meaning it took just over two and a half years before the indication was off by a whole day - caused by that quirky .5 of a day, 12 hours 44 minutes and 2.9 seconds of unaccounted for moon phase. Then watchmakers designed a more refined mechanism, with 135 teeth to be exact, for the higher end watches. With this the accuracy is now correct up to 122.5 years. Still this was not enough for some people, and the desire to create super accurate moon phase complications continues today. A brand who know a thing or two about top complications A. Lange & Söhne Richard Lange Perpetual Calendar Terraluna This watch pushes the boundaries of ‘accurate Moon Phase’ and use different gear ratios to achieve accuracy of 1,058 years. The Moon completes it orbit around a visible earth on the back of the watch. Making the front and the back of this timepiece truly stunning. Lange-Terraluna-Breakdown-Gear-Patrol-Lead-Full   Patek Philippe Sky Moon Tourbillon is breathtaking in all ways. The Moon Phase complication will be correct for 1,073 years! Showcasing a beautiful celestial display - a correct chart of the stars- on the second face of the double-faced watch. The front also has a minute repeater and the entire watch houses a vast 12 complications. PatekPhilippeSkyMoonTourbillon6002G-8   And finally take  look at this; the Jaeger-LeCoultre Duomètre Sphérotourbillon Moon is one of the best Moon Phase watches out there.  It wins the accuracy race with its Moon Phase only being off one full day after 3,887 years. Exciting watch experts with its dual-wing movement, flyback seconds, bi-axial tour billion ( exceptionally pretty to watch) and dual power reserve plus of course this astonishingly accurate Moon Phase complication. Jaeger-LeCoultre Duomètre Sphérotourbillon 1