Citizen Promaster Marine Eco-Drive Men's Diving Watch BN0266-07E (40.6 mm, Sapphire Crystal with Anti-Reflective Coating, Solar Cal. E118, 200 m Diver, Benebiol™ Strap)

Description and Key Features

The Citizen Promaster Marine BN0266-07E represents the contemporary evolution of Citizen’s iconic professional diving series, adapted to compact dimensions of 40.6 mm in diameter and 11.7 mm in thickness. Designed as an uncompromising diving tool, it incorporates the proven Eco-Drive solar technology (Caliber E118), capable of generating continuous power from any light source (solar or artificial) with months of autonomy in the dark, completely eliminating the need to change batteries or open the case periodically.

This generation takes a leap forward by incorporating a flat sapphire crystal with an anti-reflective coating, a screw-down crown for total water resistance to 200 meters (20 bar), and anti-magnetic protection. As a technical and environmental innovation, it features a strap made of Benebiol™ biomass urethane, a high-tech biopolymer material that offers durability and resistance to cracking caused by salt spray, sweat, and UV rays far superior to that of silicone or conventional rubber.

Technical Specifications

Technical Detail
Brand / Collection Citizen Promaster Marine
Reference BN0266-07E
Movement Origin Japan (Japan Movement)
Movement In-house Eco-Drive solar quartz (light-powered)
Caliber Citizen E118
Power Reserve Several months of continuous operation in total darkness when fully charged
Case Dimensions 40.6 mm (diameter without crown) × 11.7 mm (thickness)
Case Material Solid stainless steel with brushed and polished finishes
Crystal Flat sapphire crystal with anti-reflective coating (Antireflection Coating)
Bezel: Unidirectional rotating bezel for 60-minute diving with a luminescent marker at 12 o’clock
Dial: Matte black with oversized geometric hour markers for high readability
Luminescence: High-intensity, long-lasting photoluminescence on hands and hour markers
Crown: Screw-down crown with side protectors integrated into the case
Case Back: Solid, screw-down case back with the official Promaster engraving
Water Resistance: 200 Meters / 20 Bar (suitable for water sports, swimming, and scuba diving)
Magnetic Resistance Anti-magnetic shielding against everyday electromagnetic interference
Strap Material Highly durable Benebiol™ sustainable biomass urethane
Strap Width and Clasp Classic stainless steel pin buckle clasp
Calendar Date window (day-of-the-month indicator) at the 4 o’clock position

Key Selling Points

• Balanced 40.6 mm Geometry: Solves the problem of classic oversized 44 mm dive watches. With a 40.6 mm case and a thickness of less than 12 mm, it offers an ergonomic and proportionate fit that doesn’t wobble on the wrist and allows for very comfortable everyday wear.
• Sapphire Crystal with Anti-Reflective Coating: Maximum resistance to scratches from sea sand, abrasion, and rough handling, ensuring clear optical transparency free of unwanted reflections both in sunlight and underwater.
• Maintenance-Free Eco-Drive Solar Mechanical Movement: Eliminates the expense and risk of replacing the battery every two years (during which water resistance is often compromised due to a poor seal). Any light source continuously recharges the internal energy cell.
• Benebiol™ Biomass Technical Strap: Developed with state-of-the-art plant-based polymers, it offers a silky feel and resistance to chemical wear, sweat, and salt water far superior to that of conventional rubber straps.
• Actual Water Resistance 200 M (20 ATM): The screw-down crown with a double gasket and the screw-down case back ensure complete water resistance for demanding water sports.
• Immediate Instrument Visibility: Large-surface hands and raised hour markers treated with high-contrast luminescent pigment allow you to check the remaining dive time in conditions of absolute darkness.

E-commerce Optimization Notes (For backend and marketplace)

• High-Conversion Keywords: Citizen Promaster Marine 40mm, Citizen BN0266-07E, Citizen Eco-Drive Sapphire Diver, 200m solar-powered sapphire diving watch, Citizen Promaster Benebiol, Citizen solar-powered diving watch.
• Essential Technical Filters in the Catalog: Enable the following attributes on the platform: Solar Movement / Eco-Drive, Sapphire Crystal with AR Coating, 40.6 mm Diameter, 20 Bar / 200 m, Screw-Down Crown, Anti-Magnetic, and Urethane / Silicone Strap.