Citizen Watch: Promaster Marine Eco-Drive Diver Blue BN0267-04L

Citizen Promaster Marine BN0267-04L: the professional solar diver for everyday wear

The Citizen Promaster Marine Eco-Drive Diver Blue BN0267-04L is a true diving watch designed around a 40.55 mm stainless steel case with ISO 6425 certification. Its sunray blue dial is paired with a navy blue unidirectional rotating bezel and a blue strap, while its water resistance of 20 bar / 200 meters allows the Citizen Promaster Diver to be used for scuba diving.

The Citizen Promaster Marine Eco-Drive Diver measures only 11.69 mm in thickness with an official European weight of 85 g. Its gradient blue dial features applied indices and highly luminescent hands, accompanied by 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 an advertised accuracy of ±15 seconds per month. The E118 also features a low-charge indicator, a quick-start function, and overcharge protection.

Finally, the Blue Citizen Promaster Diver features a blue polyurethane strap made from BENEBiOL™, a material developed from plant-derived raw materials and designed to provide good durability for sporting use. It is 20 mm wide and features a pin buckle clasp. The Promaster Marine Diver thus combines solar technology, professional diving certification, and a relatively compact format in a particularly impactful configuration.

Technical Specifications

• Brand: Citizen
• Collection: Promaster
• Model: Promaster Marine Eco-Drive Diver Blue
• Reference: BN0267-04L
• 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: Blue sunray, date at 3 o'clock
• Hands: Luminescent arrows
• Indices: Applied stick and dot indices, luminescent
• Crown: Screw-down
• Bezel: Unidirectional rotating, black
• Strap: Blue 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 Blue BN0267-04L 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 a year when fully charged, eliminating the 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, deep blue dial, and matching strap. With a diameter of just 40.55 mm and a thickness of less than 12 mm, the Promaster Marine Diver BN0267-04L remains versatile enough for daily wear while retaining the technical specifications of a true 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 notably the creator of Eco-Drive technology, which is capable of transforming natural or artificial light into electrical energy stored in a rechargeable power cell.

The Promaster collection includes Citizen professional watches designed specifically for diving, aviation, and outdoor activities. With the Citizen Promaster Marine Eco-Drive Diver, the brand combines its expertise in solar movements with ISO 6425-certified construction. The Promaster Marine Eco-Drive Diver BN0267-04L illustrates this approach with its E118 caliber, 365-day power reserve, anti-reflective sapphire crystal, and 200-meter water resistance.