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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

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About This Item

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.
  • General
    • Brand: Citizen
    • Model Number: BY1010-81H
    • Product Name: Eco-Drive Tsuki-yomi Radio Controlled BY1010-81H Mens Watch Moonphase World Time Super Titanium Grey Dial 100M
    • Color: Silver
  • Dimensions
    • Case Thickness: 10.8 millimeters
    • Case Size: 43mm (The diameter or longest measurement of the case.)
  • Warranty
    • Warranty - Parts: 1 year
  • Other
    • Case Shape: Round
    • Clasp Type: Push button
    • Display Type: Analog
    • Band Material: Titanium
    • Case Material: Titanium
    • Water Resistant: true (Resists some degree of water penetration.)
    • Quartz Movement: Eco-Drive
    • Calendar Display: true
    • Crystal Type: Synthetic sapphire crystal
    • Special Function(s): Day of week display
    • Band Color: Silver
    • Caliber: H874
    • UPC: 4974374338143

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
Whats Included
  • 1 x BY1010-81H, User Manual, Warranty Card
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