JAPAN REFERENCECASIO · JAPANESE-MARKET REFERENCE
WVA-M640D-1A2JF
WVA-M640D-1A2JF
CASIO WVA-M640D-1A2JF is a Japanese-market reference. The resin / stainless steel case and bezel are paired with a stainless steel band. Tough Solar (solar charging system). Features include MULTIBAND radio-controlled timekeeping and world time. Listed water resistance: 10-bar water resistance.
- Reference
- WVA-M640D-1A2JF
- Case (H × W × D)
- 52 × 43.5 × 12.3 mm
- Weight
- 91 g
- Listed water resistance
- 10-bar water resistance
🎉 Buy 2 Watches, Get 20% Off One
Choose any 2 watches and receive 20% off the lower-priced watch.
All products are eligible. The offer applies to one watch per order.
🚚 Get Extra Savings to Help Cover Shipping
Spend ¥35,000 (Approximately $225 USD | €198 EUR) or more after product discounts and receive
an additional ¥3,000 (Approximately $20 USD | €18 EUR) off your order subtotal.
Both offers can be combined and are applied automatically at checkout. No code needed.
The qualifying subtotal excludes shipping and taxes. The qualifying amount and discount are based on Japanese yen. Amounts shown in your selected currency may vary with exchange rates.
Couldn't load pickup availability
Read our shipping and return information before ordering. Model-specific warranty and repair guidance is available below.
Setup & support
Model reference: WVA-M640D-1A2JF
Search the official manual using this model or the module number on your watch.
Find the official CASIO manualBefore you choose
Warranty & service
Local warranty service outside Japan is not guaranteed. Read our return and repair policy and ask about your exact reference before ordering.
Bracelet fit & adjustments
Check the case dimensions and band details in the specifications. Ask us about fit, included links and adjustment options before placing an order.
Packaging & included items
Included items can vary by reference. Contact us with the model number to confirm the box, documents and accessories.
Ask about this referenceProduct details
- Model
- WVA-M640D-1A2JF
- JAN / EAN
- 4549526138140
- Intended use
- Wristwatch
- Band material
- Stainless steel band; one-touch three-fold clasp
- Crystal material
- Resin glass (spherical / curved surface)
- Weight
- 91 g
- Case size (L × W × H)
- 52 × 43.5 × 12.3 mm
- Price
- ¥34,820 JPY
- Country of origin
- JP
Specifications
Specifications
| Release date | October 2016 |
|---|---|
| Japan MSRP | Japan MSRP: ¥33,000 (including Japanese tax) |
| Case size (H × W × D) | 52 × 43.5 × 12.3 mm |
| Weight | 91 g |
| Case and bezel material | Resin / stainless steel |
| Band | Stainless steel band; one-touch three-fold clasp |
| Water resistance | 10-bar water resistance |
| Time adjustment | MULTIBAND 6 radio-controlled timekeeping: Japan, North America, Europe and China |
| Power supply and battery life | Tough Solar (solar charging system) |
Exterior details
Exterior details
| Glass | Resin glass (spherical / curved surface) |
|---|---|
| Compatible wrist size | 150–205mm |
| Other features | Neobrite |
Watch functions
Watch functions
| World time | World time: 29 cities (29 time zones, daylight saving on/off) plus UTC (Coordinated Universal Time) |
|---|---|
| Stopwatch | Stopwatch: 1/100 second, 60-minute capacity |
| Timer | Countdown timer: 1-minute setting increments, maximum 100 minutes, 1-second measurement |
| Alarm | 5 daily alarms and hourly time signal |
| Light | LED light with afterglow |
| Light color | LED: amber |
| Calendar | Full auto-calendar |
| Power saving | Power saving: turns off the display and stops the hands after a period in the dark |
| Battery indicator and alerts | Battery level indicator |
| Operating time | Operating time from a full charge without further solar charging |
| With normal functions in use: approximately 4 months | |
| In power-saving mode: approximately 22 months | |
| Accuracy | Without radio signal reception, the watch operates at normal quartz accuracy (±15 seconds per month). |
| Other features | 12/24-hour format; 3 display options (date and day, seconds, time); day display in 5 languages (Japanese, English, German, Spanish, Chinese) |
| Button operation tone | Button operation tone on/off |
| Time calibration details | Home time cities (supported reception cities) / time calibration signals |
| Tokyo / Japan: JJY40 and JJY60 | |
| (Honolulu), (Anchorage), Los Angeles, Denver, Chicago, New York / United States: WWVB | |
| London, Paris, Athens / United Kingdom: MSF; Germany: DCF77 | |
| Hong Kong / China: BPC | |
| Cities in parentheses may receive signals under favorable conditions. Radio signal reception: automatic (up to 6 times a day, up to 5 for China) / manual | |
| Japan: JJY, 40 kHz / 60 kHz (supports both Fukushima and Kyushu stations) | |
| North America: WWVB, 60 kHz | |
| Europe: MSF / DCF77, 60 kHz / 77.5 kHz | |
| China: BPC, 68.5 kHz | |
| When the home city supports reception, the watch receives the appropriate station for that city. The time difference is set according to the selected city. | |

Explore a feature upgrade
A different reference with additional listed features. Check all specifications before choosing.
More in this model family
Explore related colour and specification variations. Check each reference for its exact features.
Find your next reference
Similar watches
Explore models selected by series, materials, size and listed features.
Same series
JAPAN REFERENCESame series
JAPAN REFERENCESame series
JAPAN REFERENCESimilar specifications
JAPAN REFERENCERecently viewed
Pick up where you left off in this browsing session.
JAPAN REFERENCE