The Citizen Eco-Drive Tsuki-yomi A-T is a landmark achievement in modern watchmaking, blending breakthrough technology with striking design. Celebrating Citizen’s innovation legacy, this 30th Anniversary model is the world’s first moonphase watch synchronized with atomic timekeeping. The rich deep red dial is accented with black and silver-tone details, delivering exceptional legibility and a bold, refined presence. Crafted from Super Titanium, the 43mm case and bracelet are remarkably lightweight, scratch-resistant, and comfortable for daily wear. Powered by Citizen’s Eco-Drive technology, the watch runs on any light source and never needs a battery. With radio-controlled atomic accuracy, an automatically adjusted moonphase display, and premium finishing, the Tsuki-yomi A-T is a perfect fusion of science, style, and celestial inspiration.

Key Highlights

• World’s First Atomic Moonphase Watch

• Eco-Drive Technology – powered by light, no battery required

• Atomic Timekeeping (A-T) for extreme accuracy

• Super Titanium™ Case & Bracelet – lightweight and scratch-resistant

• 43mm Case Size with push-button deployment clasp

• Deep Red Dial with black and silver-tone accents

• 30th Anniversary Commemorative Model