---
product_id: 105923045
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, Grey, F91W"
brand: "casio"
price: "¥12565"
currency: JPY
in_stock: true
category: "Casio"
url: https://www.desertcart.jp/products/105923045-f91w-series-digital-watch-water-resistant-led-light-1-100
store_origin: JP
region: Japan
---

# Water Resistant up to splash-proof level 7 Year Long-lasting Battery 1/100 SEC Stopwatch precision 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, Grey, F91W

**Brand:** casio
**Price:** ¥12565
**Availability:** ✅ In Stock

## Summary

> ⌚ Stay sharp, stay ahead — the classic digital watch for the modern go-getter!

## 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, Grey, F91W by casio
- **How much does it cost?** ¥12565 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/105923045-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

- • **Timeless Durability:** Crafted with resilient resin case and band for everyday hustle.
- • **Day & Night Visibility:** LED backlight ensures you never miss a beat, even in low light.
- • **Always On, Always Ready:** 7-year battery life means no interruptions, just consistent performance.
- • **Effortless Functionality:** Daily alarm and regular timekeeping keep your schedule sharp and on point.
- • **Precision at Your Fingertips:** 1/100 second stopwatch to track your productivity and workouts flawlessly.

## Overview

The Casio F91W is a lightweight, water-resistant digital watch featuring a precise 1/100 second stopwatch, LED backlight for easy reading anytime, and a remarkable 7-year battery life. Designed with a durable resin case and band, it offers reliable daily alarm and timekeeping functions, making it a trusted companion for professionals who value timeless style and dependable performance.

## Description

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.

## Features

- Water Resistant
- LED Back light ensures easy reading in day or night
- 1/100 Second Stop Watch (Measuring Capacity: 59'59.99")
- Daily Alarm
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07C9F8XLL |
| Age Range Description | Adult |
| Band Colour | Black |
| Band Material Type | Resin |
| Band Width | 19.25 Millimetres |
| Bands | 1 |
| Best Sellers Rank | 3,252 in Fashion ( See Top 100 in Fashion ) 5 in Men's Wrist Watches |
| Brand Name | Casio |
| Case Diameter | 35.5 Millimetres |
| Case Material Type | Resin |
| Case Thickness | 8.38 Millimetres |
| Character | Fashion |
| Clasp Type | Buckle |
| Closure Type | Buckle |
| Crystal | mineral |
| Customer Reviews | 4.5 4.5 out of 5 stars (55,511) |
| Dial Color | Gray |
| Display | Digital |
| Embellishment Feature | Crystal |
| Face Style | Gray, minimalist, or digital |
| Global Trade Identification Number | 00889232187525, 08892321875250 |
| Included Components | watch band |
| Item Shape | Rectangular |
| Item Type Name | Watch |
| Item Weight | 0.05 Pounds |
| Manufacturer | Casio |
| Manufacturer Part Number | F-91WM-1BCF |
| Model Name | F-91WM-1BCF |
| Model Number | F-91WM-1BCF |
| Model Series | F91W |
| Number of Items | 1 |
| Number of Packs | 1 |
| Pattern | Solid |
| Power Source | Battery Powered |
| Series Number | 107234743 |
| Special Features | Alarm, Second Hand, Water Resistant |
| Sport Type | Walking |
| Strap Type | Two Piece Strap |
| Style Name | F91W |
| Theme | Accessories |
| UPC | 889232187525 |
| 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, Grey, F91W - Image 1](https://m.media-amazon.com/images/I/61WO7fKhX0L.jpg)

## Available Options

This product comes in different **Color** 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.

## 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 AE1200WH Series | Men’s Digital Watch | 100M WR | Multi Alarms | 100 SEC Stopwatch | Countdown Timer | World Map for World Time | LED Light | LC Analog Display | 10 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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**Shop now:** [https://www.desertcart.jp/products/105923045-f91w-series-digital-watch-water-resistant-led-light-1-100](https://www.desertcart.jp/products/105923045-f91w-series-digital-watch-water-resistant-led-light-1-100)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-30*