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Citizen Tsuki Yomi A-T Moonphase Gray Eco-Drive Men's Watch BY1010-57H

When breakthrough technology and spectacular design meet, the Tsuki-yomi A-T is reading the moon. It’s the world’s first moonphase watch combined with atomic timekeeping innovation from Citizen, and this 30th Anniversary model is nothing short of impressive. The styling embodies the moon’s surface and a window at 6 o’clock displays the current moon phase. The timepiece measures 43mm in a silver-tone Super Titanium case, where sharp faceted edges pair with an elevated design throughout for an eye-catching aesthetic on the wrist. The grey dial works in tandem with black accents and silver-tone touches for a display that’s as handsome as it is legible. In addition to its running time, the watch features a moon phase display, world time in 24 time zones, a perpetual calendar, and day-date functionality. Powered by Citizen’s proprietary Eco-Drive technology to provide light-powered vitality without ever needing a battery. Water resistant up to 100 metres. Calibre H874. Super titanium case and bracelet with a grey dial. Sapphire crystal. Fold over clasp with push button.


  • Case Material:        Super Titanium
  • Case Size:                43mm
  • Band Material:        Super Titanium
  • Dial Color:                Grey
  • Water Resistant:     100 Meters
  • Movement:               Eco-Drive
  • Clasp Type:              Fold Over Clasp with Push Button
  • Crystal:                     Sapphire Crystal
  • Warranty:                 5 Years Manufacturer Warranty

      Buy with confidence from an Authorized Citizen Watch Dealer.