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 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 blue 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 meters. Caliber H874.
Tsuki-yomi A-T
Free Bracelet Sizing
5 Year limited warranty
Product Details
Model
- BY1010-57L
- 12/19/2023
Movement Technology
- H874
- Eco-Drive
- Powered by any light source, continuously and sustainably, eliminating the need to replace watch batteries.
Case Width (mm)
- 43
Lug Width (mm)
- 22
Band Type
- Bracelet
- Super Titanium
Case Material
- Silver-Tone
- Super Titanium
Crystal
- Sapphire Crystal
- Superior scratch resistance and hardness
Clasp
- Fold Over Clasp with Push Buttons
Dial
- Blue
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
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Reviews
Perfect everyday watch
This watch isn't only beautiful but it's a great size. It's light weight which makes it a great everyday watch.
Great watch
I can’t say enough god things about this particular watch. It looks great, the watch arrived on time and very well packaged. The atomic clock sync works great, I live in NC and it works, just wait for the nightly sync if it doesn’t work during daytime hours. Love the functionality, moon phase looks great and works great, all the features Citizen chose to implement are useful and make this watch a must have for every day.
Citizen Response
Tsuki-yomi A-T
Excellent experience leading to an excellent purchase. Citizen Watch customer service was awesome in answering my questions and providing watch options based on my 'wants'. The watch was easy to set up and looks great!
Great watch
I love this watch and planning to buy the red/purple one. Extremely pleased with the purchase.
Tsuki-yomi A-T
Watch (with the blue face) is stunning and functions perfectly. It arrived running and all I had to do was adjust to my time zone. Ordering and delivery process was outstanding - from order placement to delivery was 4 days including bracelet adjustment by Citizen. This is my first Citizen and will not be my last!
Beautiful and Practical
After tiring of having to adjust Automatics each morning I decided to take another look at Citizen's eco-drive. I routinely wear long sleeved shirts and my previous eco-drive could not stay charged. My new Tsuki=yomi AT watch has an impressive power reserve allowing it to continue to keep excellent time under the cuff before again getting decent light. The dial is large enough that my old eyes can see what I want but not as 'busy' as dive watches which now allows me to tell the time from a quick glance. The moon phase feature is not something I need but it is kind of cool. The Atomic Time keeping works well in my location without special handling of the watch. All in all I am VERY HAPPY with this watch
Amazing Watch Experience!
This is exactly what I was hoping for when I purchase it if not more. the attention to details, the amazing technology, the weight and the looks of this watch gives you a select feel of premium and confort. Amazing watch in every sense.
Beautiful watch
I purchased the 30th anniversary moon phase watch for my husbands Christmas gift. He owns several but his favorite stopped working so I wanted to replace it with a newer watch. He’s very happy. It’s a beautiful watch and, as always, very well made.
My second favorite Citizen.
Other than my Octavia, this is my favorite Citizen watch. There isn’t anything I dislike and I love that it sets the time and date everyday without my help.
Love this watch
This is my new favorite watch!
