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.
Model #: BY1010-57L
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Product Details
Model
- BY1010-57L
Movement
- H874
- Eco-Drive
- Powered by any light source, continuously and sustainably, eliminating the need to replace watch batteries.
Dial
- Blue
Case
- 43 mm
- Silver-Tone
- Super Titanium
Lug
- 22 mm
Band
- Bracelet
- Super Titanium
- Fold Over Clasp with Push Button
Crystal
- Sapphire Crystal
- Superior scratch resistance and hardness
Water-Resistance
- WR100/10Bar/333ft (Swimming, Marine Sports)
Weight (g)
- 105 g
Additional Functions
- Moonphase Indicator
- World Time in 24 Time Zones
- Day/Date
- Radio-Controlled
- Perpetual Calendar
Reviews
Better than advertised
I've been wearing this for about a week and it has exceeded expectations based on some comments. (1) The lume is perfectly adequate even at 3am; not light-up-the-room brilliant but I have no trouble telling the time many hours after the watch has stopped being exposed to a light source. (2) The lighter weight does not translate into a "cheap feel" to the watch once it's on your wrist. The only challenging part is learning how to adjust the bracelet, since these are collared pins. Find a YouTube video to see how to take out and reinsert links before embarking on an adjustment if you haven't adjusted one of these before. The titanium case/bracelet, atomic clock synch, moonphase, and power meter all check boxes for elements that were lacking in previous purchases in my collection. I've purchased far more expensive watches, but this one delivers on the value proposition.
Outstanding Watch
A long time Citizen fan. This watch replaced my original moon phase watch. Great quality and performance as well as its handsome looks. Echo Drive and atomic setting is a great combination.
As a space nut this watch does it for me. What a great addition to my collection (both watches and space memorabilia). Light, classy, sharp.