Tsuki-yomi A-T BY1010-57H

The Tsuki-yomi A-T marks 30 years of Citizen's atomic timekeeping with a moonphase complication that's paired with radio-controlled accuracy. The 43mm Super Titanium case has sharp, faceted edges, and the gray dial shows the moon phase in a window at 6 o'clock, surrounded by black and silver accents. It also tracks world time in 24 time zones, a perpetual calendar, and day-date. The Eco-Drive H874 keeps it running on light alone, no battery needed.

This model comes on a Super Titanium bracelet with a fold-over push-button clasp. It's water resistant to 100 meters, good for swimming and snorkeling, and the sapphire crystal protects the dial. To see the Tsuki-yomi's moonphase in action, visit our store in Willis, Texas.