Citizen Tsuki-yomi A-T BY1010-57H Moonphase Eco-Drive Watch – 30th Anniversary Limited Edition

Experience celestial precision with the Citizen Tsuki-yomi A-T BY1010-57H – the world’s first moonphase watch with atomic timekeeping. Designed to commemorate Citizen’s 30th anniversary of atomic timekeeping, this innovative timepiece blends futuristic functionality with lunar-inspired elegance.

Crafted from durable Super Titanium™, the 43mm case showcases a bold silver-tone finish with sharp faceted edges that mirror the moon’s dynamic surface. The grey dial, accented with silver-tone hands and black detailing, offers a visually striking yet highly legible display. At 6 o’clock, a moonphase aperture beautifully tracks the current lunar phase — a captivating blend of art and science.

Key Features:

• Model: BY1010-57H

• Movement: Citizen Caliber H874 – Atomic Timekeeping + Eco-Drive

• Technology: Eco-Drive – Powered by any light source, never needs a battery

• Case Size: 43mm

• Lug Width: 22mm

• Case & Bracelet Material: Super Titanium™ (Silver-Tone Finish)

• Crystal: Anti-reflective Sapphire – Scratch-resistant and ultra-clear

• Clasp Type: Fold Over Clasp with Push Button for secure fit

• Dial Color: Grey with moonphase window and contrasting markers

• Water Resistance: 100M / 10 Bar / 333ft – Suitable for swimming and marine sports

Advanced Functions:

• Moonphase Indicator – Tracks lunar cycles with precision

• Radio-Controlled Accuracy – Automatically adjusts time via atomic signals

• World Time – Supports 24 time zones for global synchronization

• Perpetual Calendar – Automatically adjusts for months and leap years

• Day/Date Display – Keep track of the calendar at a glance

Why Choose the Tsuki-yomi A-T?

This timepiece is more than a watch — it’s a statement of innovation, craftsmanship, and astronomical inspiration. Ideal for tech enthusiasts, collectors, and those who value cutting-edge horology, the Tsuki-yomi A-T represents the pinnacle of Citizen’s engineering.

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Discover the Citizen Tsuki-yomi A-T BY1010-57H – the world’s first moonphase + atomic timekeeping watch. Eco-Drive powered, Super Titanium case, 43mm, 24 time zones, and water resistant up to 100M. Shop now at E-Commerzz!