The Citizen BN0265-00A (cataloged within the globally acclaimed Citizen Promaster Marine Collection / Promaster Sea Series, and referenced internationally as the BN0265-00A Promaster Dive) is an authoritative, high-performance Japanese light-powered quartz professional diving instrument. Crafted to deliver uncompromising aquatic reliability in a modernized, versatile silhouette, this reference marks an important evolution in Citizen's storied Promaster family. By introducing a trimmed 40.6mm case diameter and a slender 11.7mm profile thickness, Citizen answers the call of divers and watch enthusiasts for a true, certified dive tool that wears with agile comfort both on land and deep underwater. Across international horological communities, everyday carry (EDC) circles, and marine exploration forums, it has earned cherished community nicknames—the "Compact Diver", "White Polar Diver", "Eco-Drive Sapphire Diver", "Promaster 40.6", "Polar Promaster", or "Benebiol Khaki Diver"—for its high-visibility matte white dial, jet-black unidirectional elapsed-time bezel, scratch-resistant sapphire crystal with anti-reflective coating, bio-based BENEBiOL™ olive green strap, and official ISO 6425 diver's certification. It unites a sculpted 316L solid stainless steel case measuring 40.6mm across with an arctic white dial face, high-contrast luminous markers, an in-house Japanese Eco-Drive solar quartz engine, anti-reflective sapphire glass, certified 20-bar water resistance, and an integrated high-flexibility strap. It's perfectly calibrated for scuba divers, ocean athletes, outdoor adventurers, and discerning professionals seeking a rugged tool watch that transitions effortlessly from open-water expeditions and weekend training to casual office wear.

The defining visual centerpiece of this BN0265-00A reference is its high-contrast polar marine instrument dial and rotating dive bezel. Finished in a clean matte white tone, the dial disc is crafted from eco-conscious recycled materials that let ambient light pass smoothly into the solar cell beneath. Bold applied geometric hour markers—featuring circles, elongated batons at 6 and 9 o'clock, and a prominent inverted triangle at 12 o'clock—are framed by dark contrasting borders and filled with high-output photoluminescent compound, emitting a long-lasting glow in total darkness or murky water. Broad black-outlined sword hands sweep authoritatively across the face alongside a needle-thin central sweep seconds hand. At 3 o'clock sits an integrated date calendar window that delivers practical daily utility while preserving balanced dial symmetry. Framing the dial is a unidirectional 60-minute rotating solid stainless steel timing bezel treated with a black ion-plated (IP) finish, featuring crisp white elapsed-time numerals and a luminous pip at 12 o'clock for accurate tracking of dive intervals. 

Beneath its tailored exterior, the watch is driven by Citizen’s in-house Calibre E118 Japanese Eco-Drive solar quartz movement, engineered and manufactured at Citizen’s dedicated horological facilities in Japan. Utilizing Citizen’s proprietary light-powered technology, the movement captures and converts any natural sunlight or indoor ambient light into electrical energy stored in a secondary rechargeable lithium-ion power cell, completely eliminating the need for disposable battery replacements. Operating at an ultra-stable quartz oscillation frequency of 32,768 Hz, the movement delivers a factory-rated precision tolerance of ±15 seconds per month. A major technological highlight of the Calibre E118 is its exceptional efficiency: on a single full charge, the movement delivers an autonomous operating run time of approximately 1 year (365 days) under normal operating conditions. The caliber incorporates essential smart power-management complications, including an Insufficient Charge Warning Function (which moves the sweep seconds hand in distinct two-second jumps to signal low energy), an Overcharge Prevention Function to protect cell longevity during prolonged sunlight exposure, and a Time Setting Warning Function.

The case is engineered with versatile sports proportions, measuring an official 40.6mm in case width (diameter), an ergonomic profile thickness of 11.7mm, an interhorn lug width of 20.0mm, and a lightweight total weight of approximately 86.0 grams. This compact, trimmed profile ensures the watch sits comfortably flat and well-balanced on the wrist, eliminating the excessive bulk often associated with traditional professional dive watches. The solid 316L stainless steel case architecture combines vertical hairline satin brushing across the upper surfaces with high-gloss mirror-polished case flanks and beveled edges. Dial protection is provided by a premium, scratch-resistant flat sapphire crystal glass treated with an anti-reflective (non-reflection) inner coating, ensuring crystal-clear readability under harsh sunlight or underwater glare.

Built to satisfy rigorous ISO 6425 diving standards, the case features a heavy-duty knurled screw-down crown at 3 o'clock protected by integrated case crown guards, as well as a solid stainless steel screw-down caseback deeply engraved with the iconic Citizen Promaster insignia and technical certifications. This heavy-duty sealing architecture secures a certified 20-bar (200 meters / 660 ft) water resistance rating, making it completely qualified for scuba diving, marine exploration, snorkeling, surfing, and high-impact water sports. In addition, the timepiece features JIS Type 1 Antimagnetic construction, shielding the internal quartz oscillator against magnetic fields encountered near boats, electronic instruments, and modern devices. The watch comes completed on an integrated dark green/khaki BENEBiOL™ biomass-based polyurethane strap (fitting wrist circumferences from 145 to 215 mm). Developed from plant-derived bio-materials, BENEBiOL™ offers superior tensile flexibility, reduced environmental footprint, and outstanding resistance to hydrolysis, preventing degradation and cracking from prolonged contact with saltwater, perspiration, and humidity. The strap is secured by a robust solid stainless steel pin buckle and dual keeper loops.

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• UAE Orders: Delivered within 1 business day
• International Orders: Typically delivered within 2–5 business days after being processed
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• 14-Day Return & Refund Policy from the date of delivery – see our Refund Policy for full details