Citizen Watch: Promaster Marine Eco-Drive Diver White BN0265-00A

Citizen Promaster Marine BN0265-00A: the professional solar-powered diver for daily use

The Citizen Promaster Marine Eco-Drive Diver White BN0265-00A is a true diving watch designed around a 40.55 mm stainless steel case with ISO 6425 certification. Its white dial contrasts with a black unidirectional diving bezel and a green strap, while its 20 bar / 200 meters water resistance makes the Citizen Promaster Diver suitable for scuba diving.

The Citizen Promaster Marine Eco-Drive Diver measures only 11.69 mm in thickness for an official European weight of 85 g. Its white dial features applied indices and highly luminescent hands, accompanied by an orange second hand and a date window at 3 o'clock. An anti-reflective sapphire crystal protects the Promaster Marine Diver, while the screw-down crown and case back reinforce its tool-watch construction.

The Citizen Promaster Diver is powered by the Citizen E118 caliber, an Eco-Drive solar quartz movement capable of harnessing both natural and artificial light. Once fully charged, the caliber has a maximum power reserve of approximately 365 days and offers an announced accuracy of ±15 seconds per month. The E118 also includes a low-charge indicator, a quick-start function, and overcharge protection.

Finally, the Citizen Promaster White Diver features a green polyurethane strap using BENEBiOL™ material, developed from plant-based raw materials and designed to offer high resistance for sports use. It is 20 mm wide and features a pin buckle. The Promaster Marine Diver thus combines solar technology, professional diving certification, and a relatively compact format in a particularly versatile configuration.

Technical specifications

• Brand: Citizen
• Collection: Promaster
• Model: Promaster Marine Eco-Drive Diver White
• Reference: BN0265-00A
• Movement: Eco-Drive solar quartz
• Caliber: Citizen E118
• Power reserve: Approximately 365 days after full charge
• Accuracy: ±15 seconds per month
• Functions: Hours, minutes, seconds, and date
• Date: Window at 3 o'clock
• Case: 316L stainless steel
• Diameter: 40.55 mm
• Thickness: 11.69 mm
• Weight: 85 g
• Crystal: Sapphire with anti-reflective coating
• Case back: Screw-down
• Dial: Sunray white, date at 3 o'clock
• Hands: Luminescent arrows
• Second hand: Orange
• Indices: Applied stick and dot indices, luminescent
• Crown: Screw-down
• Bezel: Black unidirectional rotating
• Strap: Green BENEBiOL™ polyurethane, material using plant-based components
• Strap width: 20 mm
• Clasp: Pin buckle
• Water resistance: 20 bar / 200 meters
• Certification: ISO 6425, certified diving watch.
• Citizen Warranty: 3 years

Why choose this watch?

The Citizen Promaster Marine Eco-Drive Diver White BN0265-00A offers a true certified diver configuration: ISO 6425, 200-meter water resistance, screw-down crown, screw-down case back, unidirectional bezel, and anti-reflective sapphire crystal. At the same time, the E118 caliber provides the Promaster Marine Eco-Drive Diver with a power reserve of up to one year after a full charge, with no need for regular battery changes thanks to the Eco-Drive system.

The Citizen Promaster Marine Eco-Drive Diver also stands out for its well-proportioned dimensions, its white dial—unusual in the diving world—and its green strap. With a diameter of only 40.55 mm and a thickness of less than 12 mm, the Promaster Marine Diver BN0265-00A remains versatile enough to be worn daily while retaining the technical characteristics of a genuine Citizen Promaster watch.

About the Citizen brand

Citizen is a Japanese watch manufacturer that develops both its watches and its own movements. The brand is famously the originator of Eco-Drive technology, capable of transforming natural or artificial light into electrical energy stored in a rechargeable cell.

The Promaster collection includes Citizen's professional watches intended for diving, aviation, and outdoor activities. With the Citizen Promaster Marine Eco-Drive Diver, the brand combines its expertise in solar movements with an ISO 6425 certified construction. The Promaster Marine Eco-Drive Diver BN0265-00A illustrates this approach with its E118 caliber, 365-day power reserve, anti-reflective sapphire, and 200-meter water resistance.