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 metres. Calibre H874.
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Product Details
Model
- BY1010-57L
Movement Technology
- H874
- Eco-Drive
- Powered by any light source, continuously and sustainably, eliminating the need to replace watch batteries.
Case Size (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 Button
Dial
- Blue
Water-Resistance
- WR100/10Bar/333ft (Swimming, Marine Sports)
Additional Functions
- Moonphase Indicator
- World Time in 24 Time Zones
- Day/Date
Reviews
Chuck S.
Excellent product...
I love this watch!
I have a thing for nice watches, from automatics (like my Breitling) to fully manuals (like my Omega) to some quartz watches like this one. This is my current favorite. It's beautiful, light for its size (thanks to the titanium construction) and very, very accurate, thanks to the quartz movement and sync to the atomic clocks. I've even enjoyed occasionally checking it against the time.gov website, and it's always exactly on the second with that feed. All of that plus the fact it charges from available light, shows the Moon phase, and has a perpetual calendar, makes this a very good and enjoyable timepiece!
Excellence
I’ve owned this watch for about three weeks now and it’s still early for a long term review but I gotta say a few things off the bat. 1. I love the weight it’s light enough that I’m not constantly noticing that I’m wearing it but it’s heavy enough that it doesn’t feel wispy on my wrist. 2. I’ve checked on how well it keeps time and I’m seriously impressed with the movement. I know I’ve only had it for a short while but I’m really enjoying this watch as an everyday wear.
Looks Better in Person
I had been admiring the watch's style as it appeared in various emails and promotions for awhile. Finally, ordered it during the Earth Day promotion and it is exceeding my expectations. Except of the extra light weight of the watch, you would not know this is titanium. Citizen seems to be the only one to have mastered how to finish titanium. Love the perpetual calendar, the world time and, especially, the radio time keeping. Never have to wonder if the watch is displaying the correct time or day. The moon phase dial just adds to my fascination with this watch.