Citizen Eco-Drive Pro Marine watch, steel, BN0261-51E
Citizen Eco-Drive Pro Marine is a stainless steel diver's watch with a black dial and date display
The dial reads Diver's 200 m, and the watch is made for scuba diving. Water resistance is 200 m / 20 atm, the screw-down crown improves water resistance, and the unidirectional bezel times dives. The luminous hands and indexes on the black dial are also visible in the dark.
The round case is stainless steel and 40.6 mm wide, and the silver-coloured steel bracelet continues the same look. A sapphire crystal protects the dial, and the date display is at three o'clock. The Eco-Drive watch is charged by light, so the battery never needs to be replaced. Fully charged, it runs for up to 180 days without light. The 50th anniversary of Citizen's Eco-Drive technology is in 2026.
Product number: BN0261-51E
Brand: Citizen
Model: Eco-Drive Pro Marine
Category: Men's watches
Movement: Eco-Drive / Solar
Caliber: E168
Power reserve when fully charged: up to 180 days without light
Features: Date display
Crystal: Sapphire crystal
Case material: Stainless steel
Case color: Silver/gray
Case width: 40.6 mm
Bracelet material: Stainless steel
Bracelet color: Silver/gray
Dial color: Black
Water resistance: 200 m / 20 atm
Shape: Round
Frequently asked questions
Does the watch need a battery?
No. The Eco-Drive watch is charged by light, and when fully charged it runs for up to 180 days without light.
Is the watch suitable for scuba diving?
Yes, the watch is marked Diver's 200 m and has water resistance of 200 m / 20 atm. Do not operate the crown or buttons underwater, and rinse off salt water and sweat after use.
How wide is the watch case?
The round steel case is 40.6 mm wide.
















