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Citizen Eco-Drive Tsuki-yomi Super Titanium Radio Controlled Grey Dial BY1010-81H 100M Men's Watch
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Why you'll love it
A feature-rich watch for the tech-savvy individual.
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Message Nick →Description
The Citizen Eco-Drive Tsuki-yomi Super Titanium Radio Controlled BY1010-81H is a sophisticated men's watch designed for the modern global traveler and watch enthusiast. Combining advanced technology with elegant aesthetics, this timepiece offers precision and style. Its durable titanium construction ensures comfort and longevity, making it suitable for daily wear and special occasions.
This Citizen watch features a striking grey dial with an intricate moonphase display, adding a touch of celestial charm. Powered by Citizen's innovative Eco-Drive movement, it harnesses light energy, eliminating the need for battery changes. The radio-controlled functionality ensures atomic timekeeping accuracy, while world time capabilities make it an ideal companion for international journeys.
Highlights:
- Eco-Drive Movement: Powered by light, never needs a battery.
- Radio Controlled: Atomic timekeeping for superior accuracy.
- Super Titanium: Lightweight and highly durable case and bracelet.
- Moonphase Display: Elegant and functional lunar phase indicator.
- World Time: Convenient for international travel.
With its robust 100m water resistance and scratch-resistant sapphire crystal, the Citizen BY1010-81H is built to withstand the rigors of an active lifestyle while maintaining its refined appearance. It's a perfect blend of high-tech features and classic watchmaking artistry.
Specifications
- Model/Ref
- BY1010-81H
- Gender
- Men's
- Display
- Analog
- Movement
- Eco-Drive (Caliber: H874)
- Case Material
- Titanium
- Case Size
- 43mm
- Case Thickness
- 10.8mm
- Band Material
- Titanium
- Lug Width
- 22mm
- Crystal
- Sapphire Crystal
- Dial Colour
- Grey
- Water Resistance
- 100m / 10ATM
How it works
What this watch’s key specs actually mean on the wrist.
Solar
Solar-powered movement
A solar cell under the dial turns any light — sunlight or a desk lamp — into power and stores it in a cell that lasts for months in the dark. You get quartz accuracy with no battery changes to think about, ever.
100m / 10 ATM
Water resistance
Rated to 100m / 10 ATM — genuinely swim-ready. Laps, snorkeling and a day at the beach are all no problem; it just isn't a scuba watch.
81-hour reserve
Power reserve
Fully wound, this movement stores about 81 hours of running time when it's off your wrist. That's roughly 3 full days — take it off on Friday and it can still be running Monday morning. Power reserve is simply how long the mainspring keeps the watch going once you stop wearing it.
43mm
Case size
The case measures 43mm across (excluding the crown) — a modern, present size with real wrist presence, at its best on medium-to-larger wrists. Case size is the single biggest factor in how a watch actually wears, so it's worth picturing against your own wrist.
Titanium
Case material
Titanium is about 40% lighter than steel yet stronger, and it never triggers a metal allergy — so a big watch wears like a small one and disappears on the wrist. It resists salt-water corrosion too, which is why you see it on serious tool watches.
Frequently Asked
What type of movement does the Citizen BY1010-81H use?
The Citizen BY1010-81H features an Eco-Drive movement (Caliber: H874), which is powered by light and does not require battery changes.
Is this watch suitable for swimming?
Yes, with a water resistance of 100m (10ATM), the Citizen BY1010-81H is suitable for swimming and snorkeling.
What is the case material of this watch?
The case and bracelet of the Citizen BY1010-81H are made from lightweight and durable Super Titanium.
Does the watch have a perpetual calendar?
Yes, the Citizen BY1010-81H includes a perpetual calendar function, which automatically adjusts for different month lengths and leap years.
What is the size of the watch case?
The Citizen BY1010-81H has an approximate case diameter of 43mm, making it a prominent yet comfortable size for most wrists.
What special features does the dial offer?
The grey dial of the Citizen BY1010-81H features an analog display, a moonphase indicator, world time, and luminous hands and markers for readability.
This piece ships through our authorized dealer network. All applicable customs and import fees are already included in the price shown, so nothing extra is owed when your order is delivered.
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