The Citizen Promaster Diver BN0150 (nicknamed "Ecozilla") is the larger 48 mm titanium variant of the Promaster diver lineup, with solar Eco-Drive movement and 300 m water resistance. A divers watch that holds its own against far more expensive Seikos and Doxas in spec.
Used pricing in 2026: EUR 250-400 depending on bracelet condition.
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48 mm titanium wears more comfortably than steel at the same diameter but is still a serious wrist presence. Try before buying if possible.
Eco-Drive movements have a 10-year-ish secondary cell life - sellers should confirm the seconds hand moves continuously when fully charged.