Jaquet Droz Introduces New Grande Seconde Moon in Black Enamel
Jaquet Droz added a moon-phase complication to its growing collection of Grande Seconde timepieces at last year’s Baselworld. As we await the revelation of the brand’s full array of new products at Baselworld 2018 in March, Jaquet Droz has offered us a glimpse of the latest version of the Grand Seconde Moon, now fronted by a handsome black enamel dial.
Like its predecessors, the Jaquet Droz Grande Seconde Moon Black Enamel features on its double-level grand feu enamel dial an astronomical moon-phase indicator that requires adjustment only once every 122 years and 46 days. Jaquet Droz’s specially developed ?mechanism 135,? which drives the moon-phase indication, has a carefully studied gear ratio that makes it much more precise than the 59-toothed mechanism in a traditional moon-phase, which accumulates an error of one day in approximately two years, seven months, and 20 days.
The moon-phase disk, centered inside a satin-finished gold ring for the date display and a 60-second scale for the running seconds, is made of black onyx, with tiny gold stars and a realistic-looking moon made of 18k rose gold that rotates clockwise in synch with the actual moon?s lunar cycles. The double-level structure of the dial aids in legibility, while a corrector positioned in the side of the case at 8 o?clock ? operated by a stylus that is included with each watch ? makes adjustments of the moon-phase easy. The upper subdial, the other element of the Swiss brand’s hal...
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