Hover to zoom · tap for full screenCASIO F-91W-1 Watch
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100% authentic CASIO, shipped from our store in Thailand.
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Specifications
Basics
- Case size (W × L × H)
- 38.2 × 35.2 × 8.5 mm
- Weight
- 21 g
- Case / bezel material
- Resin
- Band
- Resin band
- Water resistance
- Water resistance
- Power supply & battery life
- Approx. battery life
- Approx. 7 years on CR2016
Exterior
- Glass
- Resin glass
Watch features
- Stopwatch
- 1/100-second stopwatch
- Measuring capacity
- 59'59.99''
- Measuring modes
- Elapsed time, split time, 1st–2nd place times
Hourly time signal
- Daily alarm
Light
- LED light
Calendar
- Auto calendar (February fixed at 28 days)
Accuracy
- Accuracy
- ±30 s per month
Other features
- 12/24-hour format
- Regular timekeeping
- hour, minute, second, pm, date, day
About the F-91W-1
The F-91W-1 is CASIO's legendary black digital watch, made continuously since 1989. Its resin case weighs just 21 g and is 8.5 mm thin, with a 1/100-second stopwatch, alarm, LED light and auto calendar. CR2016 battery lasts about 7 years; accuracy ±30 seconds a month.
Also known as: F-91W-1DG · F-91W-1UR · F91W
Frequently asked questions
How long does the F-91W battery last?
About 7 years on a CR2016 battery according to the brand's specs, depending on how often you use the light and alarm.
Is the F-91W water resistant?
It's water resistant for everyday use — hand washing and rain — but not suitable for swimming or showering.
Is the F-91W-1DG the same watch as the F-91W-1?
Yes. The suffix (DG) is CASIO's market/packaging code — the watch itself is the same F-91W-1.
Customer reviews
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