CITIZEN PROMASTER ECO-DRIVE BN0266-07E BLACK MEN WATCH
BN0266-07E
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- 3 Years Warranty
The Citizen Promaster BN0266-07E is the understated one — a black sunray dial, black ion-plated bezel and black perforated strap on a silver-tone stainless steel case. If someone asked you to draw a dive watch from memory, it would probably look remarkably like this. That's the appeal: the classic, executed properly, with nothing to prove.
Underneath the neutral finish is the full 2026 Promaster platform. The new Calibre E118 Eco-Drive movement holds approximately 12 months of power reserve from a full charge — double the previous generation — with no battery to replace, ever, and ±15 seconds per month accuracy. ISO-certified 200-metre water resistance, a screw-down crown, and an anti-reflective sapphire crystal make it a genuine diving instrument.
At 40.6mm across and 11.7mm thin, weighing about 86 grams on the strap, it avoids the oversized look that dominated dive watches for years. Short, downward-curving lugs help it wear smaller than its specifications suggest. The strap is BENEBiOL™ — a biomass-based polyurethane developed by Mitsubishi Chemical, perforated for comfort and offering a lower environmental footprint than conventional petroleum-derived material.
At a Glance
- BrandCitizen
- CollectionPromaster Dive
- MovementCalibre E118 Eco-Drive
- Case Size40.6mm
- Thickness11.7mm
- Weight~86g
- DialBlack Sunray
- BezelBlack IP, Unidirectional
- GlassSapphire, Anti-Reflective
- StrapBlack Perforated BENEBiOL™
- Water Resistance200m, ISO-Certified
- Full Charge ReserveApprox. 12 Months
Why You'll Love It
- This is the daily-driver of the four new Promaster colourways — the all-black finish matches everything, draws no unwanted attention, and moves from the office to the ocean without a second thought.
- An approximately 12-month power reserve from a full charge is double the previous generation of Citizen Eco-Drive divers — genuinely long-term peace of mind, even if it sits unworn for months.
- Genuine ISO dive certification means this meets the recognised international standard for dive watches, not just a "water resistant" marketing claim.
- At 40.6mm and 11.7mm thin, it avoids the oversized proportions that became fashionable for years — and short, downward-curving lugs help it wear even smaller than the specs suggest.
- The black ion-plated bezel uses an aluminium insert, giving it a subtle warmth reminiscent of older bakelite-style bezels rather than the flat look of ceramic.
- The BENEBiOL™ strap uses a biomass-based raw material developed by Mitsubishi Chemical, offering improved durability with a genuinely lower environmental footprint — and the perforation keeps it comfortable in heat.
- At around 86 grams it's genuinely light for an ISO-certified diver, comfortable for all-day wear rather than just for the water.
- Anti-reflective sapphire crystal, a screw-down crown and antimagnetic construction round out a properly engineered tool watch.
Perfect For
- Dive Watch Enthusiasts
- Everyday Versatility
- Eco-Drive & Solar Watch Fans
- Understated & Stealth Styling
- Active & Outdoor Lifestyle
- Sustainability-Minded Buyers
- First Dive Watch
- Gift for Him
Key Features
- Black sunray dial — with applied indices and a date display at 3 o'clock.
- Black ion-plated unidirectional bezel — with an aluminium insert, for genuine dive-timing functionality.
- Citizen Eco-Drive Calibre E118 — new-generation light-powered movement, no battery required, holding a charge for approximately 12 months in full darkness once fully charged.
- ISO-certified 200m water resistance — with a screw-down crown for genuine dive-rated sealing.
- Accuracy of approximately ±15 seconds per month — precise quartz timekeeping.
- Anti-reflective sapphire crystal — scratch-resistant and glare-free.
- Antimagnetic construction — added everyday resilience.
- Luminous hands and markers — clear visibility in low light and underwater.
- 40.6mm silver-tone stainless steel case — 11.7mm thick, weighing around 86 grams, with short downward-curving lugs.
- Black perforated BENEBiOL™ biomass-based polyurethane strap — buckle clasp, improved durability and lower environmental footprint.
- Insufficient Charge Warning and Overcharge Prevention — the watch manages and protects its own charge automatically.
Technical Specifications
The Citizen Promaster BN0266-07E is a 40.6mm men's Eco-Drive diver powered by the new Calibre E118, accurate to approximately ±15 seconds per month with a full-charge power reserve of approximately 12 months. The silver-tone stainless steel case measures 11.7mm thick with an anti-reflective sapphire crystal, screw-down crown, and a black ion-plated unidirectional bezel with aluminium insert, water resistant to 200 metres and ISO-certified for diving. The black sunray dial carries applied indices, luminous hands and markers, and a date display at 3 o'clock. It weighs around 86 grams on a black perforated BENEBiOL™ biomass-based polyurethane strap.
| Model Number | BN0266-07E |
| Case Material | Stainless Steel, Silver-Tone |
| Case Shape | Round |
| Case Diameter | 40.6mm |
| Case Thickness | 11.7mm |
| Weight | Approx. 86g |
| Bezel | Black Ion-Plated, Unidirectional, Aluminium Insert |
| Crown | Screw-Down |
| Glass | Sapphire Crystal, Anti-Reflective |
| Water Resistance | 200 Metres, ISO-Certified |
| Colour | Black, Sunray |
| Markers | Applied Indices, Luminous |
| Hands | Luminous |
| Display | Hours, Minutes, Seconds, Date (3 O'Clock) |
| Material | BENEBiOL™ Biomass-Based Polyurethane |
| Colour | Black, Perforated |
| Clasp | Buckle |
| Caliber | Citizen E118 |
| Type | Eco-Drive (Light-Powered) |
| Accuracy | Approx. ±15 Seconds/Month |
| Full Charge Reserve | Approx. 12 Months |
| Construction | Antimagnetic |
| Functions | Insufficient Charge Warning, Overcharge Prevention |
Best Matched With
- Everyday Casual
- Technical Outerwear
- Dark Denim
- Smart-Casual Office
- Beach & Water Sports
- Travel Essentials
Frequently Asked Questions
Is this a genuine dive watch?
Yes. It carries ISO certification for dive watches, with a screw-down crown, unidirectional bezel and 200 metres of water resistance — a real diving instrument, not just diver-styled.
Is the whole watch black?
The dial, bezel and strap are black — the case itself is silver-tone stainless steel, with a black ion-plated bezel on top. The result reads as an all-black watch with a subtle steel frame rather than a fully blacked-out case.
How does this compare to the other Promaster colourways?
Same Calibre E118, same 40.6mm case, same ISO 200m certification across all four. This is the most neutral and versatile of the set — the blue (BN0267-04L) leans nautical, the orange (BN0268-01E) is the high-visibility statement, and the white-and-olive (BN0265-00A) reads closer to a field diver.
How does the rotating bezel work?
The unidirectional bezel tracks elapsed time — line up the marker with the minute hand at the start of a dive or activity, then read off elapsed time as the bezel rotates. It only turns one way, a safety feature that prevents misreading less time than has actually passed.
What is BENEBiOL™?
BENEBiOL™ is a biomass-based raw material for polyurethane, developed by Mitsubishi Chemical Corporation. It's used in this watch's strap to improve durability while lowering the environmental footprint compared to standard petroleum-derived polyurethane. The perforations also keep it comfortable in heat.
What is Eco-Drive?
Eco-Drive is Citizen's light-powered movement technology. A cell beneath the dial converts any light source — sunlight, a lamp, an overhead office light — into energy stored in a rechargeable cell, so the watch never needs a battery.
How long does the charge last if I stop wearing it?
Approximately 12 months from a full charge with no further light exposure — double the previous generation of Citizen Eco-Drive divers. An Insufficient Charge Warning function alerts you before the reserve runs out.
Can I actually dive with this watch?
Yes. With ISO certification and 200 metres of water resistance, it's built and tested for recreational diving, not just swimming or water sports.
Will 40.6mm fit my wrist?
40.6mm sits comfortably in the modern men's diver range and suits most wrist sizes well. The short, downward-curving lugs help it wear smaller than the specification suggests, and at 11.7mm thick and around 86 grams it's genuinely light and compact for an ISO-certified diver.
Is the strap adjustable?
Yes. The BENEBiOL™ strap closes with a standard buckle and can be sized as needed. City Chain can assist with fitting in-store if required.
What warranty does this watch come with?
The BN0266-07E comes with a 3-year warranty when purchased from City Chain Singapore, an authorised Citizen retailer. Keep your warranty card and proof of purchase — both are required when submitting the watch for service at any City Chain outlet.
Why Buy from City Chain Singapore
- Authorised Retailer 100% genuine Citizen product
- 3-Year Warranty Covered on every purchase
- Free Shipping All orders within Singapore
- Strap Fitting Assist in-store
Extra $15 OFF with min. $200 spend
Use Code: FORYOU15
Extra $30 OFF with min. $400 spend
Use Code: FORYOU30
Caliber No.: E118
Movement: Eco-Drive
Strap: Polyurethane Strap
Water Resistant: Water Resistant to 200m
Thickness: 11.7mm
Case Size: 40.6mm
Case: Stainless Steel
Glass: Sapphire Glass
Maximum run time from full charge (Normal Use Condition): Approximately 12 months
Date Display
Insufficient Charge Warning Function
Overcharge Prevention Function
Delivery within Singapore
Order by 11AM
(Mon - Fri for faster processing)
Checkout options may vary depending on order value and eligibility.
• Free Speedpost Domestic Delivery — 1–2 business days
• Free DHL Domestic Delivery — next business day
• Express Delivery — S$30, order by 2PM
• Click & Collect — ready in 2–3 business days. Please wait for the collection confirmation email before visiting the store.
Weekend & Public Holiday Orders
Orders placed after the applicable cut-off time, on weekends, or on public holidays will be processed on the next business day. Delivery will take place on the next available business day based on the selected delivery service.
During peak periods, festive seasons, major launches or sale events, additional processing and delivery time may be required.
For online purchase, you can have bracelet or leather strap adjustments done at any City Chain store. Please bring along your warranty book for the service.
