Citizen - Eco-Drive Tsuki-yomi Radio Controlled BY1010-81H Mens Watch Moonphase World Time Super Titanium Grey Dial 100M - Silver
Model: BY1010-81H
SKU: 11945378
Reviews coming soon
Reviews coming soon
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.
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.
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.
It automatically synchronizes with atomic clocks in North America, Europe, China, and Japan for ultra-precise timekeeping.
Automatically accounts for the number of days in the month and leap years until the year 2100.
Grey-Black with a photorealistic lunar surface texture
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