---
product_id: 47900771
title: "Casio Classic F91W Series Quartz Watch | Water Resistant |1/100 Second Stopwatch | Daily Alarm | Hourly Time Signal |Auto Calendar |SS Caseback |12/24-Hour Format"
brand: "casio"
price: "1497966₫"
currency: VND
in_stock: true
reviews_count: 10
url: https://www.desertcart.vn/products/47900771-casio-classic-f91w-series-quartz-watch-water-resistant-1-100
store_origin: VN
region: Vietnam
---

# 30m water resistant daily durability auto calendar with 12/24h format 1/100 sec stopwatch precision Casio Classic F91W Series Quartz Watch | Water Resistant |1/100 Second Stopwatch | Daily Alarm | Hourly Time Signal |Auto Calendar |SS Caseback |12/24-Hour Format

**Brand:** casio
**Price:** 1497966₫
**Availability:** ✅ In Stock

## Summary

> ⌚ Timeless tech for the savvy professional — stay sharp, stay ahead.

## Quick Answers

- **What is this?** Casio Classic F91W Series Quartz Watch | Water Resistant |1/100 Second Stopwatch | Daily Alarm | Hourly Time Signal |Auto Calendar |SS Caseback |12/24-Hour Format by casio
- **How much does it cost?** 1497966₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/47900771-casio-classic-f91w-series-quartz-watch-water-resistant-1-100)

## Best For

- casio enthusiasts

## Why This Product

- Trusted casio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Auto Calendar:** Never miss a date with a hassle-free, self-updating calendar in your preferred time format.
- • **Iconic Minimalist Design:** Classic 37mm resin case blends timeless style with lightweight comfort for all-day wear.
- • **Everyday Water Resistance:** Splash-proof design keeps pace with your busy lifestyle without missing a beat.
- • **Reliable Alarm & Hourly Signal:** Stay on top of your schedule with discreet daily alarms and hourly chimes.
- • **Precision Timing at Your Fingertips:** Experience ultra-accurate 1/100 second stopwatch for flawless time tracking.

## Overview

The Casio Classic F91W is a legendary digital watch featuring a precise quartz movement, 1/100 second stopwatch, daily alarm, and 30-meter water resistance. Its durable resin case and auto calendar with 12/24-hour format make it a reliable, minimalist timepiece perfect for everyday use and active professionals seeking functional style without the fuss.

## Description

From the manufacturer Casio Values "Necessity is not the mother of invention, invention is the mother of necessity." These are the words of one of Casio's founders. The people who created Casio were determined to 'invent necessity'- to create products that met latent needs with groundbreaking capabilities no one had ever seen before. Ever since, Casio has been doing just that, bringing new discovery and delight to people around the world. This is Casio's way of building an even more prosperous, richly rewarding world. Key Features 30 Meter (100 Feet) Water Resistant Suitable for everyday use. Will withstand accidental splashes but not suitable for swimming. Daily Alarm 1/100 Second Stopwatch Casio Accuracy and Reliability

Review: Excellent Value Timepiece - I have bought this same make & model of watch for something like 20 years or more, this latest (due to losing the last one on holiday) being my 4th. I did change the battery on the first (after 5 years+) but have not bothered since, as the cost of a battery was a significant % of the cost of a new watch - a bit like changing a car when the ashtray gets full!!! But up to personal choice. I had one where the rubbery strap split and broke after about 4 years- but again the cost of a strap outweighed just getting a new watch, and besides, I do not personally like to wear a watch on my wrist, just keep in my shoulder bag/trouser pocket!!! (so that one with no strap lasted me a further 3 years, before the battery died) So, if a cheap, inexpensive, accurate (20 seconds slow after 1 year) "throwaway when battery/strap broken/stopped" style of watch is what you are looking for - then in my opinion this one is a good choice. Oh - and finally, yes the light at night is not very bright (I have to also pop my reading glasses on), and the alarm is not very loud (but I find good enough as a gentle reminder for 20 seconds) - but don't a lot of people these days also have mobile/cell 'phones that do all that (and tell the time!).....so good enough as a secondary/auxiliary time piece in my view, with also handy stopwatch/time counter function.
Review: The perfect watch for wise people. Anything more is pure vanity. - The only things to survive the apocalypse will be cockroaches and Casio F-91Ws. The watch collector's watch - smart, accurate, indestructible, cheap. Does all you ever really need a watch to do. Anything more is pure vanity. Be smart - buy one, buy them all. You know it makes sense.

## Features

- Core Collection
- Quartz Movement
- Water Resistant
- 37mm Case Diameter
- Mineral Crystal

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000GAWSDG |
| Action | add |
| Age range | Adult |
| Batteries | 1 Lithium Metal batteries required. (included) |
| Batteries included? | Yes |
| Best Sellers Rank | 38,019 in Fashion ( See Top 100 in Fashion ) 181 in Men's Wrist Watches |
| Brand | Casio |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (49,157) |
| Date First Available | 29 Mar. 2008 |
| Department | Unisex |
| Display type | Digital |
| Features | Alarm, Lightweight, Water Resistant |
| Included components | All |
| Is discontinued by manufacturer | No |
| Item model number | F-91W-1X |
| Manufacturer | CASIO |
| Material type | Resin |
| Power source | Battery Powered |
| Product Dimensions | 9 x 34 x 39 cm; 53.86 g |
| Seasons | Year-round |
| Shape | Square |
| Size | No Size |
| Sport | Running, fitness |
| Style | F-91W-1 |

## Images

![Casio Classic F91W Series Quartz Watch | Water Resistant |1/100 Second Stopwatch | Daily Alarm | Hourly Time Signal |Auto Calendar |SS Caseback |12/24-Hour Format - Image 1](https://m.media-amazon.com/images/I/51mu4w1lJwL.jpg)
![Casio Classic F91W Series Quartz Watch | Water Resistant |1/100 Second Stopwatch | Daily Alarm | Hourly Time Signal |Auto Calendar |SS Caseback |12/24-Hour Format - Image 2](https://m.media-amazon.com/images/I/51ErgHuWHcL.jpg)

## Questions & Answers

**Q: Hi,  I'm female. Can I buy this watch?**
A: No unfortunately not, the timer is fuelled by the testosterone emanating from the male wrist. It won’t  work on a lady.

**Q: Mine arrived with the Battery already started. I didn't want this as it a gift for giving after being stored.**
A: The battery will last for a decade or longer. The strap will break long before then. And a decent replacement will cost more than the watch.

I have bought this particular watch repeatedly over the years. Initially I replaced the straps; in the end I just gave up and bought a new one each time. I stopped wearing a watch on my wrist when I stopped working, 8 years ago; by that time I had accumulated at least 6, all still working fine. My wife normally carries 3 around in her handbag (don't ask!); I have another 3 scattered around the pockets of various pairs of trousers. The first couple of batteries actually ran down in close succession about a week ago. I estimate that I bought the watches in question getting on for 20 years ago.

And after 20 years, a new battery cost about 50p, and took maybe 10 minutes to fit (only tool required was a screwdriver suitable for tightening the screws on spectacles).

**Q: Does the watch come with a warranty?**
A: I never thought to ask. At that price, I would doubt it. I have had three of these to date. None of the watches has ever failed; it's the strap which breaks, and a new one is almost the price of the watch.

**Q: my wrist circumference measures 8.5 inches - will it fit me?**
A: Yes.  Range is 5.5 to 8.5 inches.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Value Timepiece
*by D***G on 12 November 2016*

I have bought this same make & model of watch for something like 20 years or more, this latest (due to losing the last one on holiday) being my 4th. I did change the battery on the first (after 5 years+) but have not bothered since, as the cost of a battery was a significant % of the cost of a new watch - a bit like changing a car when the ashtray gets full!!! But up to personal choice. I had one where the rubbery strap split and broke after about 4 years- but again the cost of a strap outweighed just getting a new watch, and besides, I do not personally like to wear a watch on my wrist, just keep in my shoulder bag/trouser pocket!!! (so that one with no strap lasted me a further 3 years, before the battery died) So, if a cheap, inexpensive, accurate (20 seconds slow after 1 year) "throwaway when battery/strap broken/stopped" style of watch is what you are looking for - then in my opinion this one is a good choice. Oh - and finally, yes the light at night is not very bright (I have to also pop my reading glasses on), and the alarm is not very loud (but I find good enough as a gentle reminder for 20 seconds) - but don't a lot of people these days also have mobile/cell 'phones that do all that (and tell the time!).....so good enough as a secondary/auxiliary time piece in my view, with also handy stopwatch/time counter function.

### ⭐⭐⭐⭐⭐ The perfect watch for wise people. Anything more is pure vanity.
*by S***N on 21 August 2025*

The only things to survive the apocalypse will be cockroaches and Casio F-91Ws. The watch collector's watch - smart, accurate, indestructible, cheap. Does all you ever really need a watch to do. Anything more is pure vanity. Be smart - buy one, buy them all. You know it makes sense.

### ⭐⭐⭐⭐⭐ Awesome little watch...
*by M***P on 5 September 2022*

I bought this watch for times when I was doing outdoor rough and tumble stuff. I have other watches for dress, but this little watch was a real surprise performer. It has been totally reliable and worked well after all sorts of abuse. I cannot recommend this enough. For the price you pay it is an absolute steal, you won't be disappointed. It puts a Seiko I have to shame. If I have to mention a downside, I'd say getting you're head around the buttons can be rather interesting, and the back light isn't great. But the positives easily outweigh those negatives. I don't know how Casio can produce such a little gem for such little money. One of my better buys.

## Frequently Bought Together

- Casio F91W Series | Digital Watch | Water Resistant | LED Light | 1/100 SEC Stopwatch | Regular Time Keeping (HR, Min, SEC, PM, Date, Day) | Daily Alarm | Lightweight | 7 Year Battery
- Casio A158WA Series | Unisex Digital Watch | Vintage | WR | 100 SEC Stop Watch | Daily Alarm | Regular Time Keeping: Hour, Minute, Second, PM, Date, Day | Led Light | 7 Yr Battery

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-09*