Citizen Attesa Tsuki-Yomi A-T (Super Titanium)
The Tsuki-yomi A-T is Citizen's radio-controlled moonphase Attesa, in silver-tone Super Titanium, which is titanium hardened at the surface by its Duratect treatment. The H874 Eco-Drive runs on light, sets itself from radio time signals, and keeps a perpetual calendar with the day and date, world time and a moonphase display. That is a lot of complication for a watch you never have to wind, set or put a battery in. The case is 43 mm across and rated to 100 m, and the watch weighs 105 g on its Super Titanium bracelet, with a grey dial and a titanium caseback. It lists at $875 on Citizen's US store.
Written 28 September 2026 from Citizen's US product page.
- Reference
- BY1010-57H
- Type
- Other
- Case diameter
- 43.0 mm
- Origin
- Japan
- Movement
- Eco-Drive radio-controlled, moonphase, world time
- Caliber
- Citizen H874
- Complications
- Day-date, Perpetual calendar, Worldtimer
- Colour
- Grey
- Surface treatment
- Duratect surface hardening
- Finish technology
- Surface hardening
- Caseback
- Titanium
- Nickel-free
- Unconfirmed (clasp or buckle material not confirmed)
- Bracelet / strap
- Super Titanium bracelet
- Matching bracelet
- Standard
- Crystal
- Sapphire
- Display back
- No
- Dial
- Grey (silver-tone accents)
- Dial colours
- Silver Grey
- Availability
- Offered
- Status
- Current
- Not published
- Thickness, Lug-to-lug, Power reserve, Hardness, Construction, Lume
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Frequently asked questions
What grade of titanium is the Citizen Attesa Tsuki-Yomi A-T (Super Titanium)?
The maker confirms titanium but does not publish a grade. The maker calls the material Super Titanium. The caseback is titanium too.
What size is the Citizen Attesa Tsuki-Yomi A-T (Super Titanium)?
The case is 43 mm across. It is water resistant to 100 m.
How much does the Citizen Attesa Tsuki-Yomi A-T (Super Titanium) weigh?
About 105 g on its bracelet.
How much does the Citizen Attesa Tsuki-Yomi A-T (Super Titanium) cost, and is it available?
It is in production, at a list price of $875.
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