The Tsuki-yomi A-T watch by Citizen is the worlds first moon phase watch combined with atomic timekeeping. The watch style embodies the moons surface and with a window displaying the current moon phase you can track the moon with ease. The Tsuki-yomi A-T super titanium watch case measures 43 mm in diameter and is water resistant up to 100 meters. With a gray dial, black accents, and silver-tone touches for a display that resembles the moon itself. With a super titanium bracelet and fold over clasp you can be sure to wear this watch with ease. In addition to keeping track of time, the watch displays the current moon phase, has world time in 24 time zones, a perpetual calendar, and date functionality. Powered with Eco-Drive technology powered by any light without ever needing a battery.