Citizen · Family: Promaster
The Citizen Promaster Eco-Drive Diver BN0151-09L is a professional 44mm stainless steel dive watch powered by Eco-Drive: light-fed quartz that never needs a battery swap. It carries 200m water resistance and a unidirectional rotating dive bezel. As of July 25, 2026, Cazador has no verified price observations (n=0) for this reference.
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Citizen introduced its first solar-powered quartz watch in 1976, marketed as the Crystron Solar Cell. In 1995 it unified all its light-harvesting technology under the Eco-Drive name. The BN0151-09L belongs to the Promaster family, Citizen's professional tool-watch line, split into three environments: sea, land, and air. This model sits in the dive category, with a 44mm steel case, a unidirectional rotating bezel, and 200 meters of water resistance. We have no verified data on the exact launch year or current catalog status [UNVERIFIED].
Eco-Drive is the trade name Citizen has used since 1995 for its solar quartz technology, originally introduced in 1976 as the Crystron Solar Cell.
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It carries 200 meters of water resistance and a unidirectional rotating bezel with a dive scale.
It houses an Eco-Drive movement, commonly referred to as caliber E168 or similar, though we have not been able to verify the exact caliber [UNVERIFIED].
Eco-Drive converts light into electricity via a solar cell under the dial, charging an internal rechargeable cell.
Promaster is Citizen's professional tool-watch range, split into three environments: sea, land, and air.
Not in the traditional sense. Eco-Drive charges an internal rechargeable cell using light.