Citizen - Eco-Drive Tsuki-yomi Radio Controlled BY1010-81H Mens Watch Moonphase World Time Super Titanium Grey Dial 100M - Silver
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About this product
The Citizen Eco-Drive BY1010-81H, also known as the "Tsuki-yomi" A-T, is a groundbreaking timepiece. It features the world's first fully automatic radio-controlled Moon Phase movement combined with light-powered technology.
World's First Moon Phase Tech
This is the first watch to calculate and adjust the moon phase automatically based on radio signals received from atomic clocks. It even features a switchable display for the Northern or Southern Hemisphere.
Super Titanium™
The case and bracelet are crafted from Citizen's proprietary titanium, which is 40% lighter and 5 times harder than stainless steel. Despite its 43mm size, the watch weighs only about 101 grams.
Global Radio Control
It automatically synchronizes with atomic clocks in North America, Europe, China, and Japan for ultra-precise timekeeping.
Perpetual Calendar
Automatically accounts for the number of days in the month and leap years until the year 2100.
Dial
Grey-Black with a photorealistic lunar surface texture
- BrandCitizenModel NumberBY1010-81HProduct NameEco-Drive Tsuki-yomi Radio Controlled BY1010-81H Mens Watch Moonphase World Time Super Titanium Grey Dial 100MColorSilverCase Thickness10.8 millimetersCase Size43mm
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The Citizen Eco-Drive BY1010-81H, also known as the "Tsuki-yomi" A-T, is a groundbreaking timepiece. It features the world's first fully automatic radio-controlled Moon Phase movement combined with light-powered technology.
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