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Citizen Eco-Drive Promaster Professional Diver is used for mixed gas diving with its 6mm non-reflective curved crystal, ratcheted elapsed-time bezel, screw-back case & screw-down crown, and reinforced urethane band and extender, with a carrying case for the wetsuit strap extension. Crafted in stainless steel with luminous accents, and 300M WR. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number B873.

BAND Strap

DIAL Black, Luminous Hands and Markers


CASE MATERIAL Silver-Tone, Stainless Steel, Promaster Crown, One-Way Rotating Elapsed Time Bezel

WATER RESISTANCE WR300/30Bar/999ft [Swimming, Showering & Snorkeling]

CRYSTAL Anti-Reflective Mineral Crystal

FUNCTIONS B873, 3 Hand, Date

MODEL BJ8050-08E Eco-Drive Introduced on: 8/10/2017