CITIZEN ECO-DRIVE BM7680-57A STAINLESS STEEL MEN WATCH
BM7680-57A
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- 3 Years Warranty
he Citizen BM7680-57A is a clean, classically proportioned stainless steel watch built for daily wear rather than occasion. Its 40mm case stands just 8.2mm thick — slim enough to sit flat under a shirt cuff — and runs into a matching stainless steel bracelet for a single, uninterrupted line. Citizen also lists it as a pair model, with a matching ladies' reference available, which makes it a natural choice for couples buying together.
Power comes from Caliber E115. Citizen Eco-Drive converts light into energy stored in a rechargeable cell, eliminating the need for regular battery replacement — daylight through a window or ordinary indoor lighting is enough to keep it charged. From a full charge it runs for approximately 6 months under normal use. An Insufficient Charge Warning Function signals when the watch needs more light, and Overcharge Prevention protects the cell once it is already full. A date display keeps the one piece of information most people check daily on the dial.
The dial is protected by sapphire glass, the hardest material Citizen uses for watch crystals, and the case carries 50-metre water resistance — comfortably enough for handwashing, rain and everyday splashes. Together with the slim profile and all-steel construction, it makes a watch you can put on in the morning and stop thinking about.
At a Glance
- BrandCitizen
- MovementCaliber E115 Eco-Drive
- Case Size40mm
- Thickness8.2mm
- GlassSapphire Glass
- Case & BraceletStainless Steel
- Water Resistance50m
- Power ReserveApprox. 6 Months
- CalendarDate Display
- Charge WarningInsufficient Charge Warning
- Cell ProtectionOvercharge Prevention
- GenderGent , Pair
Why You'll Love It
- Slim enough to forget you're wearing it: At 40mm across and only 8.2mm thick, the steel case slides under a shirt cuff without catching — the single biggest comfort difference between a dress watch you wear and one you leave at home.
- No regular battery replacement: Citizen Eco-Drive converts light into energy stored in a rechargeable cell, so there is no routine battery change to book in — ordinary indoor light keeps it running.
- It tells you when it needs light: A full charge gives approximately 6 months of normal operation, and the Insufficient Charge Warning Function signals before the watch runs low, so you are never caught out by a stopped watch.
- Sapphire glass where it matters: Sapphire is the hardest crystal material Citizen fits, which is what keeps a daily-wear watch looking clear rather than hazy after a year on the wrist.
- Easy to live with, and easy to pair: 50-metre water resistance covers everyday contact with water, and because Citizen lists this as a pair model, there is a matching ladies' reference for couples buying together.
Key Features
- Eco-Drive Caliber E115 — light-powered movement; light is converted into energy stored in a rechargeable cell.
- Approx. 6-Month Power Reserve — running time from a full charge under normal use.
- Insufficient Charge Warning Function — signals when the watch needs more light.
- Overcharge Prevention Function — protects the rechargeable cell once fully charged.
- Date Display — everyday calendar information on the dial.
- 40mm Stainless Steel Case — classic proportions for a daily-wear watch.
- 8.2mm Slim Profile — sits low on the wrist and under a cuff.
- Sapphire Glass — Citizen's hardest crystal material.
- Stainless Steel Bracelet — matched to the case, adjustable in store.
- 50m Water Resistance — suitable for everyday contact with water.
- Pair Model — a matching ladies' reference is available from Citizen.
Technical Specifications
| Model Number | BM7680-57A |
| Case Material | Stainless Steel |
| Case Shape | Round |
| Case Diameter | 40mm |
| Case Thickness | 8.2mm |
| Glass | Sapphire Glass |
| Water Resistance | 50 Metres |
| Display Type | Analogue, Three Hands with Date |
| Calendar | Date Display |
| Material | Stainless Steel |
| Adjustment | Adjustable; In-Store Sizing Available |
| Caliber | Citizen E115 |
| Movement Type | Eco-Drive (Light-Powered) |
| Full-Charge Reserve | Approximately 6 Months Under Normal Use |
| Power Functions | Insufficient Charge Warning Function, Overcharge Prevention Function |
| Gender | Gent; Listed by Citizen as a Pair Model |
Frequently Asked Questions
Does the BM7680-57A need a battery?
Citizen Eco-Drive converts light into energy stored in a rechargeable cell, eliminating the need for regular battery replacement. Daylight through a window or normal indoor lighting is enough to keep it charged in everyday use. The rechargeable cell may eventually require servicing over the long term.
How long will it run if I stop wearing it?
Citizen specifies approximately 6 months of running time from a full charge under normal use. The Insufficient Charge Warning Function will signal when the watch needs more light, so you know to leave it somewhere bright for a while.
What is the glass made of?
Citizen specifies sapphire glass for this model. Sapphire is the hardest crystal material Citizen fits to its watches, which is why it is used on pieces intended for daily wear.
Can I wear it around water?
It carries 50-metre water resistance, which covers everyday contact with water such as handwashing, rain and splashes. It is not intended for swimming, diving or water sports.
How does a 40mm case wear?
40mm is the middle of the range for a men's watch and suits most wrists. What makes a real difference here is the 8.2mm thickness — a slim case sits flat and slides under a cuff instead of snagging on it. We recommend trying it on at any City Chain store.
Does it show the date?
Yes. Citizen specifies a date display for this model, so the date is on the dial and advances automatically as long as the watch is charged and running.
Can the steel bracelet be adjusted?
Yes. Links can be removed or added where compatible for a more comfortable fit. City Chain Singapore offers in-store bracelet adjustment — please bring your warranty book with you.
Is there a matching ladies' watch?
Yes. Citizen lists the BM7680-57A as a pair model alongside the ladies' EW2740-50A, which shares the same Eco-Drive technology, sapphire glass, stainless steel construction and 50-metre water resistance in a smaller 27.5mm case. Ask our staff about availability if you would like both.
What warranty is included?
This model comes with a 3-year warranty when purchased from City Chain Singapore, an authorised Citizen retailer. Keep your warranty documentation and proof of purchase for any future servicing.
Why Buy from City Chain Singapore
- Authorised Retailer100% genuine Citizen timepieces
- 3-Year WarrantyOfficial warranty coverage
- Free ShippingWithin Singapore
- Bracelet AdjustmentIn-store assistance
Extra $6 OFF with min. $100 spend
Use Code: OCT6
Extra $12 OFF with min. $180 spend
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Extra $25 OFF with min. $350 spend
Use Code: OCT25
Caliber No.: E115
Movement: Eco-Drive
Strap: Stainless Steel
Water Resistant: 50m
Thickness: 8.2mm
Case Size: 40mm
Case: Stainless Steel
Glass: Sapphire Glass
Maximum run time from full charge (Normal Use Condition): Approximately 6 months
Date Display
Eco-Drive
Insufficient Charge Warning Function
Overcharge Prevention Function
Gender: Gent
Delivery within Singapore | Order by 11AM
(Checkout options may vary depending on minimum order requirements)
• Free Standard Delivery (3 business days)
• Free Next Day Delivery
• Express Delivery at $30 (order by 2PM)
• Click & Collect (ready in 2–3 business days)
Weekend & Public Holiday Orders
Orders placed during this time will be processed on the next business day.
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.
