Citizen Eco-Drive Tsuki-yomi A-T Green Dial Super Titanium
Product Overview
The Citizen Eco-Drive Tsuki-yomi A-T is a groundbreaking timepiece that merges advanced horological innovation with striking lunar-inspired design. Celebrating its 30th anniversary, this watch stands as the world’s first to combine atomic timekeeping with a moonphase display, offering precision and elegance in one sophisticated package. Crafted for discerning watch enthusiasts and tech-savvy professionals, it delivers both aesthetic depth and functional excellence. The Tsuki-yomi A-T captures the mystique of the moon through its detailed dial and 6 o’clock moonphase window, making it ideal for those who appreciate celestial themes and cutting-edge engineering. Powered by Citizen’s Eco-Drive technology, it runs on any light source, eliminating the need for battery changes while maintaining reliable performance.
Key Features
- Atomic Timekeeping with Radio Control: Automatically syncs with atomic clocks worldwide to ensure unparalleled accuracy, adjusting for time zone changes and daylight saving time without manual input.
- Moonphase Display: A dedicated window at 6 o’clock reveals the current lunar phase, adding a poetic and functional element that reflects the watch’s celestial inspiration.
- World Time in 24 Time Zones: Track time across major global cities with ease, making it perfect for frequent travelers or professionals managing international schedules.
- Perpetual Calendar: Accurately displays the date, day, and month, automatically adjusting for leap years and varying month lengths—no manual correction needed until the year 2100.
- Eco-Drive Light-Powered Movement: The H874 caliber harnesses energy from any light source—natural or artificial—to power the watch indefinitely, removing the hassle and environmental impact of battery replacements.
- Super Titanium Construction: The 43mm case and matching bracelet are crafted from Super Titanium™, a lightweight, corrosion-resistant material that’s significantly stronger than standard titanium while remaining comfortable for all-day wear.
- Sapphire Crystal: Offers exceptional scratch resistance and clarity, protecting the green dial from daily wear and maintaining a pristine appearance over time.
- 100-Meter Water Resistance: Rated for swimming, showering, and snorkeling, this watch is built to withstand water exposure up to 100 meters (10 bar, 333 feet).
- Fold-Over Clasp with Push Buttons: Ensures a secure fit on the wrist with easy one-handed operation, combining convenience with durability.
Technical Specifications
- Model Number: BY1010-57X
- Case Material: Super Titanium™ (Silver-tone)
- Case Diameter: 43mm
- Lug Width: 22mm
- Dial Color: Green with black and silver-tone accents
- Crystal: Sapphire
- Bracelet: Super Titanium™ with fold-over clasp and push buttons
- Movement: Citizen Eco-Drive H874
- Functions: Atomic timekeeping, moonphase, world time (24 zones), perpetual calendar, day-date display
- Power Source: Light-powered (Eco-Drive)
- Water Resistance: 100 meters (10 bar / 333 ft)
- ASIN: B0DVCHBVQL
- Manufacturer: Citizen
- Department: Watches
- Date First Available: December 30, 2024
Benefits & Use Cases
The Tsuki-yomi A-T is designed for individuals who value precision, durability, and distinctive design. Its atomic timekeeping ensures you’re always on time, whether at home or abroad, while the world time function supports seamless coordination across time zones. The moonphase display appeals to collectors and romantics alike, offering a visual connection to lunar cycles. Thanks to its Super Titanium™ build and sapphire crystal, the watch resists scratches and daily wear, making it suitable for both professional settings and outdoor activities. With 100-meter water resistance, it transitions effortlessly from office wear to weekend adventures involving water. The Eco-Drive movement means you’ll never worry about battery replacements—ideal for low-maintenance, high-performance lifestyles.
Important Notes
This watch is part of a 30th-anniversary collection, emphasizing its significance as a milestone model in Citizen’s innovation timeline. While highly water-resistant, it is not designed for deep-sea diving. Regular exposure to saltwater should be followed by rinsing with fresh water to preserve the bracelet and clasp. The perpetual calendar function is accurate until the year 2100 and does not require manual adjustment for leap years. Always ensure the crown is fully pushed in and sealed after setting time or date functions to maintain water resistance. Packaging includes the watch, instruction manual, and international warranty card.
