Citizen Eco-Drive Tsuki-yomi A-T Red Dial Super Titanium
Product Overview
The Citizen Eco-Drive Tsuki-yomi A-T is a groundbreaking timepiece that merges advanced technology with striking design to deliver precision and elegance in one exceptional watch. Celebrating its 30th anniversary, this model stands out as the world’s first moonphase watch integrated with atomic timekeeping, ensuring unmatched accuracy. Designed for discerning watch enthusiasts and collectors who value innovation and craftsmanship, the Tsuki-yomi A-T combines celestial inspiration with everyday functionality. Its 43mm Super Titanium case and deep red dial create a bold, sophisticated presence on the wrist, while advanced features like perpetual calendar and world time support modern lifestyles. Powered by Eco-Drive technology, it runs on any light source, eliminating the need for battery replacements.
Key Features
- Atomic Timekeeping with Radio Control: Automatically syncs with atomic clocks worldwide to maintain precise time, adjusting for time zones and daylight saving changes without manual input.
- Moonphase Display: A dedicated window at 6 o’clock reveals the current lunar phase, inspired by the moon’s surface and adding a poetic, celestial element to the dial.
- Perpetual Calendar: Accurately tracks dates, including leap years, until the year 2100, removing the need for manual date adjustments.
- World Time in 24 Time Zones: Allows users to view the current time in any of the world’s 24 major time zones at a glance, ideal for frequent travelers or international professionals.
- Day-Date Functionality: Displays both the current day of the week and date for practical daily reference.
- Eco-Drive Technology: Powered by any light source—natural or artificial—ensuring continuous, sustainable operation without battery changes.
- Super Titanium Case and Bracelet: Constructed from lightweight, corrosion-resistant Super Titanium with a silver-tone finish, offering enhanced durability and comfort for all-day wear.
- Sapphire Crystal: Scratch-resistant crystal protects the dial, maintaining clarity and appearance over time.
- Water Resistance to 100 Meters: Rated for swimming, showering, and snorkeling, making it suitable for active use and water-related activities.
- Fold-Over Clasp with Push Buttons: Secure and easy to fasten, the bracelet clasp ensures a snug, reliable fit on the wrist.
Technical Specifications
- Model Number: BY1018-55X
- Caliber: H874
- Case Diameter: 43mm
- Case Material: Super Titanium (Silver-Tone)
- Dial Color: Deep Red with Black and Silver-Tone Accents
- Crystal: Sapphire
- Bracelet: Super Titanium with Fold-Over Clasp and Push Buttons
- Water Resistance: 100 meters (10 bar / 333 ft) – Suitable for swimming, showering, and snorkeling
- Power Source: Eco-Drive (Light-Powered)
- Functions: Time, Date, Day, Moonphase, Perpetual Calendar, World Time (24 Zones), Radio-Controlled Atomic Timekeeping
- Package Dimensions: 4.61 x 3.7 x 3.11 inches
- Item Weight: 9.91 ounces
- Manufacturer: Citizen
- ASIN: B0CB1S9JFS
- Department: Watches
- Date First Available: September 21, 2023
Benefits & Use Cases
The Citizen Eco-Drive Tsuki-yomi A-T is built for individuals who appreciate both technical innovation and refined aesthetics. Its atomic timekeeping ensures chronometric precision, making it ideal for professionals who rely on accurate time across global time zones. The perpetual calendar and world time functions cater to frequent travelers, executives, and global communicators who need instant access to international time standards. The moonphase display adds a unique, artistic touch, appealing to collectors and those drawn to celestial-inspired design. With its durable Super Titanium construction and sapphire crystal, the watch withstands daily wear while maintaining a polished look. The Eco-Drive system makes it a low-maintenance choice for active lifestyles, eliminating battery replacements and supporting sustainable use. Whether worn in the boardroom, on a flight, or during weekend adventures, this watch delivers reliability and distinction.
Important Notes
This timepiece is designed for water exposure up to 100 meters, including swimming, showering, and snorkeling, but should not be used for scuba diving or high-pressure water sports. To maintain optimal performance, avoid prolonged exposure to extreme temperatures and magnetic fields. Clean the case and bracelet with a soft cloth; avoid harsh chemicals. The watch comes in original packaging with a manufacturer’s warranty. Always refer to the official Citizen documentation for care instructions and service guidelines. This model is part of a limited 30th-anniversary series, adding collectible appeal for watch enthusiasts.
