CASIO EDIFICE EFV-640D-2AVUDF STANDARD CHRONOGRAPH MEN WATCH
EFV-640D-2AVUDF
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- 1 Year Warranty
The EDIFICE EFV-640D-2AVUDF is a proper chronograph in a size you can actually wear every day. All three inset dials are stopwatch counters — 1/10 seconds, minutes and seconds — measuring to a tenth of a second across 59 minutes 59.9 seconds, with elapsed, split and 1st-2nd place timing. This is a timing instrument, not a watch with decorative sub-dials.
What sets it apart visually is the octagonal bezel — Casio's framing is a solid, strong design, and the flat angled facets catch light differently from a round bezel as the wrist moves. Behind it sits a blue dial. The case is 44.3mm across and just 10.8mm thick at 136 grams in stainless steel, on a bracelet fitting 150mm to 205mm, rated to 100 metres of water resistance.
At a Glance
- BrandCasio EDIFICE
- SeriesStandard Chronograph
- ModelEFV-640D-2AVUDF
- Case Size47 × 44.3 × 10.8 mm
- Weight136g
- ColourBlue Dial
- Case MaterialStainless Steel
- DisplayAnalog Chronograph, 3 Hands + Date
- BezelOctagonal
- Band Size150mm to 205mm
- Water Resistance100m (10 BAR)
- Battery LifeApprox. 2 Years
Technical Specifications
The Casio EDIFICE EFV-640D-2AVUDF is an analog chronograph from the EDIFICE Standard Chronograph line, with a blue dial and an octagonal bezel, in a stainless steel case measuring 47 × 44.3 × 10.8mm and weighing 136 grams, on a stainless steel bracelet with a one-touch three-fold clasp fitting 150mm to 205mm. Three inset dials serve the stopwatch, counting 1/10 seconds, minutes and seconds to a capacity of 59'59.9" with elapsed, split and 1st-2nd place timing, alongside a date display. The glass is mineral and the watch is rated to 100 metres of water resistance. Accuracy is ±20 seconds per month and battery life is approximately two years on an SR920SW cell.
| Model Number | EFV-640D-2AVUDF |
| Case & Bezel Material | Stainless Steel |
| Bezel Design | Octagonal |
| Case Size (L × W × H) | 47 × 44.3 × 10.8 mm |
| Weight | 136g |
| Glass | Mineral |
| Water Resistance | 100 Metres (10 BAR) |
| Display Type | Analog Chronograph |
| Dial Colour | Blue |
| Hands | 3 Hands (Hour, Minute, Second) |
| Inset Dials | 3 Dials — Stopwatch 1/10 Seconds, Minutes, Seconds |
| Stopwatch Resolution | 1/10 Second |
| Stopwatch Capacity | 59'59.9" |
| Stopwatch Modes | Elapsed Time, Split Time, 1st-2nd Place Times |
| Date Display | Yes |
| Band Material | Stainless Steel |
| Clasp | One-Touch 3-Fold Clasp |
| Compatible Band Size | 150mm to 205mm |
| Movement | Analog Quartz, Battery-Powered |
| Accuracy | ±20 Seconds Per Month |
| Battery | SR920SW |
| Battery Life | Approx. 2 Years |
Frequently Asked Questions
What do the three sub-dials do?
All three belong to the stopwatch: one counts tenths of a second, one counts minutes and one counts seconds. That is what makes this a chronograph rather than a multi-dial watch — the sub-dials are a timing instrument, not a day and date display. It measures up to 59 minutes 59.9 seconds, with elapsed time, split time and 1st-2nd place timing for recording two finishing times. The date sits on the dial separately.
What does the octagonal bezel change?
Mostly how it catches light. A round bezel reflects evenly; an eight-sided one breaks the reflection into flat facets that shift as you move your wrist, which is why the watch reads as more angular and architectural than its size suggests. Casio describes the result as a solid, strong design. It is a fixed bezel — it does not rotate.
How does 44.3mm wear, and is 10.8mm really that slim?
Chronographs tend towards the large and the thick, because three counters and the mechanism behind them need room. This one fits all of it into 44.3mm across and 10.8mm top to bottom, which is slim for the type and slim enough to clear a shirt cuff rather than catch on it. At 136 grams on a steel bracelet it still has weight to it, so it feels substantial without wearing tall.
Can I swim with it?
Yes. 100-metre (10 BAR) water resistance covers swimming, snorkelling and showering. It is not a diving watch — the rating is a laboratory pressure measurement, not a depth you should swim to — so avoid scuba diving, do not use the chronograph buttons while the watch is wet, and do not pull out the crown with water on the case.
Will the bracelet fit my wrist, and can it be adjusted?
Casio lists a compatible band size of 150mm to 205mm. The bracelet is sized by removing links, which can be done in store at City Chain. It closes on a one-touch three-fold clasp, so it opens and fastens without threading a buckle.
How long does the battery last, and can I get it replaced?
Approximately two years on an SR920SW cell, keeping time to within ±20 seconds per month. Regular use of the stopwatch will shorten that. When the battery runs down, bring the watch to any City Chain outlet — having it changed by a service centre keeps the case seal correctly reseated, which protects the 100-metre rating.
What warranty does this watch come with?
The EFV-640D-2AVUDF comes with Casio's official 1-year warranty when purchased from City Chain Singapore, an authorised Casio retailer.
Why Buy from City Chain Singapore
- Authorised Retailer Official Casio warranty
- 100% Authentic Genuine Casio product
- Strap Adjustment Size it in-store
- Free Shipping All orders within Singapore
Size of Case: 47 × 44.3 × 10.8 mm
Total Weight: 136 g
Case / bezel material: Stainless steel
One-touch 3-fold Clasp
Stainless Steel Band
Mineral Glass
100-meter water resistance
1/10-second stopwatch
Measuring capacity: 59'59.9''
Measuring modes: Elapsed time, split time, 1st-2nd place times
Accuracy: ±20 seconds per month
Regular timekeeping:
Analog: 3 hands (hour, minute, second), 3 dials (stopwatch 1/10 seconds, stopwatch minutes, stopwatch seconds)
Date display
Approx. battery life: 2 years on SR920SW
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.
