---
product_id: 637987650
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: "¥8091"
currency: JPY
in_stock: true
reviews_count: 11
category: "Casio"
url: https://www.desertcart.jp/products/637987650-f91w-series-digital-watch-water-resistant-led-light-1-100
store_origin: JP
region: Japan
---

# LED Night Light clarity 7 Year Battery longevity 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

**Brand:** casio
**Price:** ¥8091
**Availability:** ✅ In Stock

## Summary

> ⌚ Timeless tech for the millennial manager on the move

## 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?** ¥8091 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/637987650-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

- • **Dependability That Lasts:** With a 7-year battery life, this watch stays powered through every project deadline and weekend adventure.
- • **Always On, Always Visible:** LED backlight ensures you never miss a beat, even in low-light meetings or late-night brainstorming sessions.
- • **Classic Meets Contemporary:** Iconic digital design with essential features like daily alarm and auto calendar—your timeless companion for modern life.
- • **Effortless All-Day Comfort:** Lightweight resin band and compact 33mm case keep you stylish and comfortable from desk to dinner.
- • **Precision Timing at Your Fingertips:** Experience split-second accuracy with the 1/100 second stopwatch—perfect for managing your busy schedule.

## Overview

The Casio F91W Series digital watch combines reliable quartz movement with practical features including a 1/100 second stopwatch, LED backlight, daily alarm, and water resistance. Its lightweight resin case and band offer all-day comfort, while the impressive 7-year battery life ensures long-term dependability. A minimalist yet iconic design, this watch is a perfect blend of vintage style and modern functionality for professionals who value efficiency and classic appeal.

## Description

Buy Casio Men's 'Vintage' Quartz Metal and Resin Casual Watch, Color:Black (Model: F-91WM-7ACF) and other Wrist Watches at desertcart.com. Our wide selection is eligible for free shipping and free returns.

Review: Simple, nice, reliable and comfortable! - I’m very happy with this watch. It is simple, light, and comfortable to wear every day. The time is easy to read and the buttons work well. The battery lasts a long time and the alarm is useful. For the price, the quality is really good. It does exactly what I need. I would recommend it if you want a basic and reliable watch.
Review: A low cost classic - Bought this for a friend. It really is a great watch, if all you want is something on your wrist to reliably keep great time and last forever at a low cost. If you want a piece of jewelry or a status symbol, this isn't it, but if all you want is a watch that serves it basic intended function this one is the gold standard.

## 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 | B01N7XKNSX |
| ASIN  | B01N7XKNSX |
| Age Range Description | Adult |
| Band Color | Black |
| Band Length | 8.75 Inches |
| Band Material Type | Resin |
| Band Width | 18 Millimeters |
| Bands | 1 |
| Batteries  | 1 Lithium Metal batteries required. (included) |
| Best Sellers Rank | #889 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1 in Men's Wrist Watches |
| Brand Name | Casio |
| Case Diameter | 33 Millimeters |
| Case Material Type | Resin |
| Case Thickness | 35.2 Millimeters |
| Character | Fashion |
| Clasp Type | Buckle |
| Closure Type | Buckle |
| Crystal | mineral |
| Customer Reviews | 4.6 4.6 out of 5 stars (57,876) |
| Date First Available  | February 10, 2017 |
| Department  | Unisex |
| Dial Color | Gray |
| Display | Digital |
| Embellishment Feature | Crystal |
| Face Style | Digital |
| Included Components | Quartz Movement, Resin Band, Brand's Case |
| Is Discontinued By Manufacturer  | No |
| Item Type Name | Watch |
| Item Weight | 0.09 Kilograms |
| Item model number  | F-91WM-7ACF |
| Manufacturer | Casio |
| Manufacturer  | Casio |
| Model Name | F-91WM-7ACF |
| Model Number | F-91WM-7ACF |
| Pattern | Solid |
| Power Source | Battery Powered |
| Product Dimensions  | 4.2 x 3.3 x 2.2 inches; 3.2 ounces |
| Series Number | 91 |
| Shape | Rectangular |
| Sport Type | Walking |
| Strap Type | Two Piece Strap |
| Style Name | F91WM-7A |
| UPC | 889232140780 |
| Unit Count | 1 Count |
| Warranty Type | Manufacturer |
| 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/61jVRs9rmwL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Simple, nice, reliable and comfortable!
*by L***. on February 3, 2026*

I’m very happy with this watch. It is simple, light, and comfortable to wear every day. The time is easy to read and the buttons work well. The battery lasts a long time and the alarm is useful. For the price, the quality is really good. It does exactly what I need. I would recommend it if you want a basic and reliable watch.

### ⭐⭐⭐⭐⭐ A low cost classic
*by P***X on February 14, 2026*

Bought this for a friend. It really is a great watch, if all you want is something on your wrist to reliably keep great time and last forever at a low cost. If you want a piece of jewelry or a status symbol, this isn't it, but if all you want is a watch that serves it basic intended function this one is the gold standard.

### ⭐⭐⭐⭐⭐ Great for kids
*by J***C on February 20, 2026*

My kid loves it. It is slim, lightweight, simple, durable.

## 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 Men's Vintage A168WA-1 Electro Luminescence Watch
- 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/637987650-f91w-series-digital-watch-water-resistant-led-light-1-100](https://www.desertcart.jp/products/637987650-f91w-series-digital-watch-water-resistant-led-light-1-100)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-03*