Citizen BY1030-50L Radio Controlled Moon Phase horloge

Citizen’s BY1030-50L men’s watch combines robust style and advanced performance, with a deep navy dial, dark outer chapter ring, slim baton markers, and a day/date window at 3 o’clock. Layered sub-dials create a chronograph-style layout, framed by a polished stainless-toned bezel and segmented-shine bracelet. Powered by Eco-Drive, it runs on light for no battery replacements. Radio controlled timekeeping synchronizes automatically, and a perpetual calendar keeps details correct. With 10 ATM water resistance, it is suitable for swimming, in a 42 mm steel case.