Citizen Moon Phase

Sitting at the more technically ambitious end of Citizen's Eco-Drive catalogue, the Moon Phase range, sold under the 'Tsuki-Yomi' name (meaning "reading the moon" in Japanese), combines the brand's light-powered engineering with a genuinely complex complication. These watches house the radio-controlled Cal. H874 movement, which uses Citizen's proprietary "Luna Program" mathematical formula to calculate the current lunar phase from multi-band radio signals, delivering accuracy to within ±15 seconds per month without a battery ever needing replacement.

Construction centres on Citizen's Super Titanium cases, a material treated to be five times harder than standard titanium while remaining notably lightweight. The dials carry moon-themed detailing that gives the range a considered, decorative quality uncommon at this price tier. The Tsuki-Yomi collection appeals to those who want a meaningful astronomical complication backed by practical, low-maintenance Eco-Drive technology.