Tsuki-yomi A-T
Atomic Timekeeping / Super Titanium™
Original price $875.00. Launched on 6/13/2025
Tsuki-yomi A-T
Atomic Timekeeping / Super Titanium™
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 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 deep purple 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 a 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 meters. Caliber H874.
Model #: BY1010-81Z
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Product Details
Model
- BY1010-81Z
Movement
- H874
- Eco-Drive
- Powered by any light source, continuously and sustainably, eliminating the need to replace watch batteries.
Dial
- Purple
Case
- 43
- Silver-Tone
- Super Titanium
Band
- Bracelet
- Super Titanium
- Fold Over Clasp with Push Buttons
Crystal
- Sapphire Crystal
- Superior scratch resistance and hardness
Water-Resistance
- WR100/10Bar/333ft [Swimming, Showering & Snorkeling]
Additional Functions
- Moonphase
- World Time in 24 Time Zones
- Radio Control
- Perpetual Calendar
- Day-Date
- Atomic Timekeeping
- Radio Control
- Perpetual Calendar
Reviews
Collection Complete
This makes #5 in my collection of all the different colors in this style. Purple is by far my favorite!
Awesome watch
I got this watch for my birthday, from my wife, we absolutely love it. I like purple and also we think the Moon phase is so cool. It weighs almost nothing due to the titanium. I think next is going to be the orange automatic! Great watch maker, period!!
Beautiful Watch
I wanted this watch the moment I saw it online and after receiving it and putting it on…WOW! This watch is just beautiful! I’ve had so many compliments and inquiries as to what kind of watch it is…. I would like to get all of the watches from this collection, soon.
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