Teddy Baldassarre
Citizen Tsuki-yomi A-T Review
Japan’s Citizen Watch Company marks 100 years of watchmaking in 2024, and some of its most noteworthy recent timepieces provide ample proof that, despite being in business for a full century, the brand’s drive toward forward-thinking technology and avant-garde design has not yet started to slow down. Take for example the Citizen Tsuki-yomi A-T, unveiled in Fall of 2023 - which is the culmination of 30 years of Citizen’s pioneering work in the field of radio-controlled atomic timekeeping. It is the first light-powered watch with a fully analog moon-phase display, and the first moon-phase that requires no manual adjustments whatsoever from the wearer thanks to its high-tech movement, Eco-Drive Caliber H874, which receives signals from six multi-band radio transmitters. The name “Tsuki-yomi” is derived from a Japanese phrase meaning “reading the moon,” and also refers to a moon god from ancient Japanese mythology, while the “A-T” is an abbreviation for “Atomic Timekeeping.” For the ingenious Eco-Drive movement, which runs to an astounding accuracy of +/- 15 seconds per month, Citizen’s designers developed a special mathematical formula that calculates the exact position of the moon on each day of the year by using the radio transmission signals from the world’s atomic clocks. The watch’s dial is also a distinguishing feature: its surface is enhanced with a textural lunar landscape motif of craters, moondust and lakes that is “bold yet subtle en...
