---
product_id: 316980728
title: "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"
brand: "casio"
price: "¥5690"
currency: JPY
in_stock: true
reviews_count: 5
category: "Casio"
url: https://www.desertcart.jp/products/316980728-f91w-series-digital-watch-water-resistant-led-light-1-100
store_origin: JP
region: Japan
---

# Water Resistant 7 Year Battery Life 1/100 SEC Stopwatch 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

**Brand:** casio
**Price:** ¥5690
**Availability:** ✅ In Stock

## Summary

> ⌚ Classic meets modern hustle — your timeless daily companion!

## Quick Answers

- **What is this?** 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 by casio
- **How much does it cost?** ¥5690 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/316980728-f91w-series-digital-watch-water-resistant-led-light-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

- • **Long-Lasting Power:** 7-year battery life means less hassle, more hustle.
- • **Light Up Your Night:** Built-in LED light ensures visibility anytime, anywhere.
- • **Sleek & Lightweight:** Slim resin case and strap for all-day comfort and style.
- • **Effortless Timekeeping:** Quartz precision keeps you on schedule with digital clarity.
- • **Stay Ready, Rain or Shine:** Water resistant design means no sweat in daily splashes.

## Overview

The Casio F91W Series is a lightweight, water resistant digital watch featuring a precise quartz movement, 1/100 second stopwatch, daily alarm, auto calendar, and an LED backlight. With a durable resin case and strap, plus an impressive 7-year battery life, it’s designed for professionals who value reliability and minimalist style in their everyday wear.

## Description

Buy Casio Men's 'Classic' Quartz Metal and Resin Casual Watch, Color:Black (Model: F-91WM-9ACF) online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: My favourite budget watch! - Love this watch. Looks great with everything :)
Review: Inexpensive, Tells Time - About 6 months on, I have been happy with it. It was inexpensive, it's very easy to wear because it's light and slim, and I can look at it when I want to know the time. I don't use the alarm. The stopwatch has come in handy on occasion. I think it looks nice.

## Features

- Water resistant, not water proof, do not submerge in water, digital sport watch in rectangle case, alarm, chronograph functions, and night light, quartz movement with digital display
- Measuring modes include net time, split time, and first and second place times, functions include digital stopwatch, hourly time signal, auto calendar, and day/date.
- Quartz Movement
- Case Diameter: 33mm
- Not water resistant

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MZF6LL2 |
| Additional Features | Chronograph, Lightweight, Timer |
| Age Range Description | Adult |
| Band Color | Black |
| Band Length | 8.75 Inches |
| Band Material Type | Resin |
| Band Width | 18 Millimeters |
| Bands | 1 |
| Best Sellers Rank | #1,648 in Fashion ( See Top 100 in Fashion ) #42 in Men's Wrist Watches |
| Bezel Color | Black |
| Brand Name | Casio |
| Case Diameter | 38.2 Millimeters |
| Case Material Type | Resin |
| Case Thickness | 35.2 Millimeters |
| Character | no subject character |
| Clasp Type | Buckle |
| Closure Type | Buckle |
| Country of Publication | China |
| Crystal | Acrylic |
| Customer Reviews | 4.5 out of 5 stars 7,723 Reviews |
| Dial Color | Gold |
| Display | Digital |
| Embellishment Feature | Crystal |
| Face Style | F91W |
| Global Trade Identification Number | 00889232140810 |
| Included Components | the brand's case |
| Item Type Name | Watch |
| Item Weight | 0.09 Kilograms |
| Manufacturer | Casio |
| Manufacturer Part Number | F-91WM-9ACF |
| Material | Resin |
| Model Name | F91WM-9A |
| Model Number | F91WM-9A |
| Model Series | F-91W |
| Number of Items | 1 |
| Pattern | Solid |
| Power Source | Battery Powered |
| Shape | Rectangular |
| Sport Type | Walking |
| Strap Type | Two Piece Strap |
| Style Name | F91W |
| Theme | Sports |
| UPC | 889232140810 |
| Unit Count | 1 Count |
| Watch Movement Type | Quartz |
| Water Resistance Level | Water Resistant |

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/51DuIbRU7JL.jpg)

## Available Options

This product comes in different **Color, Style** options.

## Questions & Answers

**Q: How are they charging $10 for this $3 watch from 1990?**
A: Anything that was $3 in 1990 is now $10.  Back in 1990 gas was $1.16/gal.  The average home price was under $150000.  As time moves on prices go up.

**Q: Does the count down timer be set to seconds?**
A: No countdown timer. Look at Model F201WA-1A for that feature.

**Q: how far in depth is the water resist**
A: If you want to be absolutely safe, get the Casio MRW200 dive watch which is good for 100 m.
Casio F91W is water resistant and you could take it in shower, swimming, etc.

**Q: The rubber band broke after 2 years of use. I love this watch and don't want to get a new one. Any tips for a replacement band? Maybe a nylone one?**
A: Aliexpress or ebay you'll find almost exact generic replacements for a couple bucks shipped. Search for words like F91W strap, 18mm watch band. You can also use normal 18mm spring bars instead of the pins that are stock with the F91W.

## Customer Reviews

### ⭐⭐⭐⭐⭐ My favourite budget watch!
*by G***S on 2 October 2023*

Love this watch. Looks great with everything :)

### ⭐⭐⭐⭐⭐ Inexpensive, Tells Time
*by J***D on 5 August 2026*

About 6 months on, I have been happy with it. It was inexpensive, it's very easy to wear because it's light and slim, and I can look at it when I want to know the time. I don't use the alarm. The stopwatch has come in handy on occasion. I think it looks nice.

### ⭐⭐⭐⭐⭐ 高コスパ 汚れにも強い
*by 正***ー on 11 March 2026*

仕事 普段使いに購入 良かった所 デザイン 金の盤面に黒のバンドで安価ながらもどこか高級感のあるシンプルなデザインです 安価 値段の割に作りが良い さすがCASIOと言ったところです 汚れに強い 現場仕事なので汚れる事もありますが汚れが付きにくくさっと拭いたら取れるので汚れにも強いです 軽さ 仕事中につけていてもストレスのない軽さです 悪かったところ あまり思いつきませんが強いて言うならバンドの留め具が少しゆるい気がします チープカシオなのでそこまで求めてないので気にしてません 全体的におすすめです 仕事にもつけて行けますし普段使いとしても使ってますデザインもいいので星5つ( -`ω-)b

## Frequently Bought Together

- Casio
- 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
- CASIO STANDARD DIGITAL WATCH WITH LED-LIGHT F-91W-1JF

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**Shop now:** [https://www.desertcart.jp/products/316980728-f91w-series-digital-watch-water-resistant-led-light-1-100](https://www.desertcart.jp/products/316980728-f91w-series-digital-watch-water-resistant-led-light-1-100)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-23*