A. Lange & Söhne puts a case-back on the spotlight with a spectacular moonphase complication
There’s nothing new about a moon-phase complication, but German top-end brand A. Lange & Söhne has taken it to a whole new level with the Richard Lange Perpetual Calendar “Terraluna” watch. Not only does the front dial look impressively sophisticated—and impeccably precise until the year 2100—the case-back also deserves attention on its own. The moon-phase mechanism comprises three separate discs: a 24-hour revolving globe on its axis (with a peripheral 24-hour scale outside the celestial disc), an anti-clockwise moon indicator and two round new moons (dark moon and full moon) underneath it. It reproduces moon cycles accurately (each 29 days, 12 hours, 44 minutes and 3 seconds) that it takes 1058 years before the display needs to be corrected by a single day. As if that’s not enough, the artisans use only solid white gold for the discs and special coating to create that deepblue color. Truly magnificent.
Different cycles of the moon shown on the moon phase display
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