A Sneak Peek at A. Lange & Söhne’s New Precision Moon Phase

A. Lange & Söhne has unveiled its Grand Lange 1 Moon Phase watch. The timepiece requires an adjustment of only one day every 122.6 years—rather than every 2.5 years as with most moon-phase watches on the market—thanks to a more precise seven-gear transmission. According to the watch manufacturer, based in Glashütte, Switzerland, it works by linking the moon display to the hour-wheel continuum, where it tracks the actual orbit of the moon in increments too slight to see with the naked eye. Additionally, the moon phase indicates the elapsed time between new moons with an accuracy of 99.9978 percent. The company manufactures the movement’s screw balance and balance spring in-house. The movement has one mainspring barrel, which stocks a 72-hour power reserve into a slim 4.7 mm.

The watch’s technicality comes with a bold design. Using a laser for precision, Lange cut more than 300 stars of different sizes into the solid 18-karat-gold lunar disk, and a patented coating process makes the blue moon-phase display appear more vivid by eliminating all non-blue hues of light that fall upon the watch face. The company expects to have the Grand Lange 1 Moon Phase in stores in the spring, with case variations in yellow gold, pink gold, and platinum. (561.833.0803, www.alange-soehne.com)

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