Citizen Tsuki-yomi A-T BY1010-57L 43mm Blue Dial Super Titanium Bracelet

Citizen Tsuki-yomi A-T BY1010-57L

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 meters. Caliber H874.

Key specifications

• Brand: Citizen
• Collection: Sport Luxury
• Line: Tsuki-yomi A-T
• Model number: BY1010-57L
• Movement: Eco-Drive (light-powered, never needs a battery)
• Movement functions: Moonphase, World Time in 24 Time Zones, Radio Control, Perpetual Calendar, Day-Date, Atomic Timekeeping, Radio Control, Perpetual Calendar
• Case size: 43mm
• Case material: Super Titanium
• Case color: Silver-Tone
• Crystal: Sapphire Crystal
• Band material: Super Titanium
• Band color: Silver-Tone
• Band type: Bracelet
• Water resistance: 100m
• Gender: Mens
• Warranty: Full 5-year Citizen manufacturer warranty. Monica Jewelers is an Authorized Citizen Retailer.

Shipping

• Shipping method and cost are calculated at checkout based on the item and your delivery location.
• Orders are typically processed within 1–2 business days; tracking is provided once your order ships.

Returns & Exchanges

• Returns accepted within 30 days of delivery.
• Items must be unworn and in original condition with all packaging and documentation; jewelry tags and watch protective stickers intact, links uncut.
• Return shipping is the customer’s responsibility. A restocking fee may apply on certain product types.
• Engraved, custom, and special-order pieces are final sale.
• To start a return or exchange, contact your nearest Monica Jewelers location.