CITIZEN CA0770-72M ECO-DRIVE CHRONOGRAPH MEN WATCH
CA0770-72M
- Low stock - 1 item left
- Backordered, shipping soon
- 20% off in cart
- 3 Years Warranty
The Citizen CA0770-72M is a working chronograph that never needs a battery. The stopwatch measures to one-fifth of a second and runs up to 60 minutes, with a 12/24-hour display and a date window alongside it — three sub-dials that do something rather than sit there for looks.
It runs on Eco-Drive. Any light charges it, natural or artificial, and a full charge holds roughly seven months in darkness. No battery, ever — which matters more on a chronograph than on a plain three-hander, because running the stopwatch is exactly what drains a conventional quartz cell fastest. The Calibre B612 keeps time to approximately ±15 seconds a month.
The case is 43mm stainless steel at 12.5mm thick, with a screw-down caseback and a blue dial in Citizen's Beginning Blue palette. Luminous hands and markers, hardened mineral glass, and 100-metre water resistance on a steel bracelet with a safety folding clasp.
At a Glance
- BrandCitizen
- TypeEco-Drive Chronograph
- MovementCalibre B612
- Case Size43mm
- Thickness12.5mm
- WeightApprox. 100g
- DialBlue (Beginning Blue)
- Chronograph1/5 Sec, to 60 Min
- GlassHardened Mineral
- Power ReserveApprox. 7 Months
- Accuracy±15 Sec/Month
- Water Resistance100m (10 BAR)
Why You'll Love It
- A chronograph that never needs a battery. Running the stopwatch is what flattens a conventional quartz cell fastest, so people stop using it — with Eco-Drive there is no reason to hold back.
- The stopwatch is genuinely precise: one-fifth of a second resolution, running up to 60 minutes. That is useful for timing anything from a run to a meeting, not just decorative sub-dials.
- Seven months of reserve from a full charge means it survives being left in a drawer through most of a year and is still running when you pick it up.
- Quartz accuracy of around 15 seconds a month — set it and forget it, with none of the daily drift a mechanical chronograph carries.
- 100-metre water resistance is a real rating, not a token one. Swimming and water sports are fine, which is unusual for a dress-leaning chronograph.
- The 12/24-hour display is quietly useful if you travel, read military time, or work shifts — it is there without cluttering the dial.
- At 43mm this has proper presence on the wrist, which is what most people want from a chronograph. The blue dial keeps it from reading as purely a tool watch.
Perfect For
- Chronograph Fans
- Larger Wrists
- Low-Maintenance Wearers
- Beach & Pool
- Smart Casual Office
- Travel & Shift Work
- Birthday Gift for Him
- Father's Day Gift
Key Features
- Citizen Eco-Drive Calibre B612 — powered by any light source, natural or artificial, with a power reserve of approximately seven months from a full charge and accuracy of around ±15 seconds per month. No battery replacement, ever.
- Chronograph to 1/5 second, up to 60 minutes — a stopwatch with genuine resolution rather than a decorative sub-dial layout.
- 12/24-hour display — a second time indication on its own sub-dial, useful for travel and shift work.
- Date display — a calendar window alongside the chronograph registers.
- Insufficient charge warning — the seconds hand moves in two-second intervals to tell you the watch needs light before it stops.
- Overcharge prevention — protects the cell once fully charged, so the watch can sit in bright light without harm.
- 43mm stainless steel case — 12.5mm thick with a screw-down caseback, on a matching steel bracelet with a safety folding clasp and double push-button release.
- Luminous hands and markers — legible in low light, with hardened mineral glass over the dial.
- 100-metre water resistance (10 BAR) — rated for swimming and snorkelling. Not rated for scuba diving.
Technical Specifications
The Citizen CA0770-72M is a 43mm men's Eco-Drive chronograph powered by Citizen's Calibre B612 — a light-powered quartz movement with a power reserve of approximately seven months, accuracy of around ±15 seconds per month, an insufficient-charge warning and overcharge prevention. The stainless steel case measures 12.5mm thick with a screw-down caseback and hardened mineral glass over a blue dial from Citizen's Beginning Blue palette, with luminous hands and markers. Functions include a chronograph measuring to 1/5 second up to 60 minutes, a 12/24-hour display and a date window. It is fitted with a stainless steel bracelet with safety folding clasp and rated to 100 metres.
| Model Number | CA0770-72M |
| Case Material | Stainless Steel |
| Case Colour | Silver-Tone |
| Case Diameter | 43mm |
| Case Thickness | 12.5mm |
| Weight | Approx. 100g |
| Caseback | Screw-Down |
| Glass | Hardened Mineral Glass |
| Water Resistance | 100 Metres (10 BAR) |
| Colour | Blue (Beginning Blue) |
| Hands & Markers | Luminous |
| Chronograph | 1/5 Second, Max 60 Minutes |
| Second Time | 12/24-Hour Display |
| Date Display | Yes |
| Material | Stainless Steel |
| Colour | Silver-Tone |
| Clasp | Safety Folding with Double Push-Button |
| Lug Width | 22mm |
| Calibre | Citizen B612 |
| Type | Eco-Drive (Light-Powered Quartz) |
| Power Reserve | Approx. 7 Months (Fully Charged) |
| Accuracy | Approx. ±15 Seconds per Month |
| Insufficient Charge Warning | Yes |
| Overcharge Prevention | Yes |
| Battery Replacement | Not Required |
Best Matched With
- Navy Polo
- White Oxford Shirt
- Grey Chinos
- Dark Denim
- Charcoal Blazer
- White Sneakers
- Technical Outerwear
Frequently Asked Questions
What can the chronograph actually measure?
Elapsed time to one-fifth of a second, running up to a maximum of 60 minutes. Press the top pusher to start and stop, the lower pusher to reset. That resolution is fine enough for timing a run, a parking meter, a workout interval or anything else you would otherwise reach for a phone to time.
How does Eco-Drive work?
A solar cell beneath the dial converts light into electrical energy and stores it in a rechargeable cell. Any light works — sunlight, office lighting, a lamp. Normal daily wear keeps it running indefinitely, and there is no battery to replace at any point in the watch's life.
Does using the chronograph drain the charge?
It uses more energy than normal timekeeping, which on a conventional quartz chronograph is why the battery dies sooner if you use the stopwatch often. With Eco-Drive the watch simply recharges in daylight, so there is no reason to leave the function unused.
What happens if I don't wear it for a while?
A fully charged watch keeps running for approximately seven months in complete darkness. If it does stop, leaving it in bright light for a few hours restarts it and you simply reset the time. Storing it face-up near a window rather than in a closed drawer avoids the issue.
What is the insufficient charge warning?
When the charge runs low, the seconds hand starts moving in two-second jumps instead of one. That is the watch telling you it needs light. Place it somewhere bright for a few hours and normal operation resumes.
What does "Beginning Blue" mean?
It is Citizen's name for the blue used on this dial, applied across several models rather than being unique to the chronograph. Treat it as a colour designation rather than a technical specification.
Is the glass sapphire?
No — this model uses hardened mineral glass. It resists everyday knocks well but will pick up fine scratches over years in a way sapphire would not. If sapphire matters to you, look at the Citizen mechanical and Super Titanium ranges, which use it as standard.
Will 43mm fit my wrist?
43mm is a large case and suits wrists from roughly 17cm upward, which is typical for chronographs — the sub-dials need the real estate to stay legible. On a wrist under 16.5cm it will read as substantial. If you want something smaller, look at the non-chronograph Eco-Drive models.
Can I swim with this watch?
Yes. With 100-metre (10 BAR) water resistance it is suitable for swimming and snorkelling. It is not rated for scuba diving. Do not operate the chronograph pushers while the watch is submerged, and rinse with fresh water after saltwater or pool exposure.
Is the bracelet adjustable?
Yes. The stainless steel bracelet can be resized by adding or removing links. City Chain offers complimentary bracelet sizing at any outlet — bring your warranty book along for the service.
What warranty does this watch come with?
The CA0770-72M 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
- Bracelet Adjustment Size it in-store
Extra $15 OFF with min. $200 spend
Use Code: FORYOU15
Extra $30 OFF with min. $400 spend
Use Code: FORYOU30
Caliber: B612
Max run time from full charge: Approximately 7 months
Case Thickness:12.5mm
Case Diameter: 43mm
Case Color: Silver
Strap Color: Silver
Dial Color: Blue
Case Material: Stainless Steel
Glass: Mineral Glass
Strap Material: Stainless Steel
24hrs and Date Display
Beginning Blue Cross-brand
Eco-Drive
Insufficient Charge Warning Function
Luminous Hands and Index
Overcharge Prevention Function
Water Resistance: 10 ATM
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.
