Casio F-91WM F-91WM-3AEF, 38mm, Black Dial, Black Plastic Band

Name: Casio F-91WM F-91WM-3AEF, Black Dial
Brand: Casio
SKU: casio-f-91wm
Price: 32.95 USD
Availability: InStock

By Serdar D.Content updated October 21, 2026

Casio F-91WM F-91WM-3AEF, Black Dial

The Casio F-91WM-3AEF is a digital quartz watch for women, featuring a black rectangular dial, alarm, and stopwatch functions, with 30m water resistance.

Price

$32.95

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About this item

Reliable digital quartz movement for accurate timekeeping.
Features daily alarm, stopwatch, and backlight for convenience.
Durable plastic case and strap for everyday wear.
30m water resistance suitable for splashes, not swimming.
Iconic minimalist rectangular dial with date display.

Top Highlights

Brand: Casio
Model Name: F-91WM
Model Number: F-91WM-3AEF
Department: Unisex
Item Type: Connected Wrist Watch
Manufacturer: Casio
First Available: February 22, 2018
Release Year: 2018

Features & Specs

Display: Digital
Movement Type: Quartz
Caliber: Module 593
Power Source: Battery powered
Additional Features: Alarm, Light Up, Stop Watch
Complications: Alarm, Stop watch, Date
Battery: Battery powered
Strap Type: Two Piece Strap
Case Material: Plastic
Case Size: 38.0 mm
Case Thickness: 8.0 mm
Lug Width: 18 mm
Weight: 21.0 g
Water Resistance: 30 m
Sport Type: Running
Strap: Plastic
Clasp: Buckle
Closure Type: Buckle
Embellishment: Crystal
Crystal: Acrylic
Dimensions: 0.91 x 1.61 x 1.54 inches; 0.74 ounces

Style

Style Name: Strap
Dial Shape: Rectangle
Dial Color: Black
Band Color: Black
Theme: Vintage
Face Style: Minimalist
Dial Markers: Minimalist

Will it fit your wrist?

Best on 6.1–6.5 in (15.5–16.5 cm) wrists

A 38 mm case sits just right on these wrists. If your wrist is 6.5–6.9 in, it looks smaller and more understated. If your wrist is 5.7–6.1 in, it looks bigger and bolder.

Measure your wrist and see what fits

A rough guide based on case diameter only.

Is this watch big or small?

56% of the watches we list are bigger than this one

The most common size is 40 mm (249 models). 200 models are 38 mm, like this one.

All our watch size data

Description

The Casio F-91WM-3AEF digital watch offers a modern take on a timeless classic, appealing to women who appreciate straightforward functionality and a retro aesthetic. This lightweight and durable timepiece is designed for everyday wear, providing reliable timekeeping without unnecessary complexities.

At its core, the F-91WM-3AEF is powered by a precise quartz movement, ensuring consistent accuracy. Its 38mm plastic case and acrylic glass contribute to its robust yet comfortable design, making it an ideal companion for daily activities. The watch also boasts a practical 30m water resistance, offering protection against splashes.

Beyond its core function, this Casio model includes essential features like a daily alarm, a stopwatch, and a convenient backlight for low-light conditions. The minimalist rectangular dial with a date display enhances its utilitarian charm, making it a versatile accessory for casual outfits and light sports.

Frequently Asked Questions

Is the Casio F-91WM-3AEF suitable for daily swimming or showering?

No, the Casio F-91WM-3AEF has a water resistance rating of 30m, which means it is designed to withstand splashes and brief immersion. It is not recommended for swimming, showering, or any prolonged water activities to prevent damage to the watch.

What are the main functions of the Casio F-91WM-3AEF digital watch?

The Casio F-91WM-3AEF offers essential digital functions including a daily alarm, a precise stopwatch for timing events, and a convenient backlight for easy readability in low-light conditions. It also displays the date clearly on its minimalist black dial.

How does the F-91WM-3AEF compare to other basic digital watches in its price range?

The F-91WM-3AEF stands out with its iconic design and proven reliability, building on the legacy of the original F-91W. While many alternatives exist, this Casio model offers a unique blend of retro style, lightweight plastic construction, and essential features at an accessible price point, making it a popular choice for daily wear.

What type of battery does the Casio F-91WM-3AEF use and how often does it need replacement?

The Casio F-91WM-3AEF is powered by a standard watch battery. While the exact battery type is not specified, these quartz watches typically offer several years of operation before a battery replacement is needed. Battery life can vary based on alarm and backlight usage.

Is the Casio F-91WM-3AEF suitable for all wrist sizes, especially for women?

With its compact 38mm plastic case and adjustable plastic strap, the Casio F-91WM-3AEF is designed to fit a wide range of wrist sizes, making it suitable for most women. The lightweight design ensures comfortable wear throughout the day, without feeling bulky on smaller wrists.

Editor's take

The Casio F-91WM-3AEF is a contemporary take on the iconic F-91W, a digital watch that has earned its place as a cultural phenomenon. It appeals to individuals seeking a straightforward, reliable, and affordable timepiece with a distinct retro charm, perfect for casual wear or light daily activities.

This model is powered by a precise quartz movement, ensuring excellent timekeeping accuracy with minimal need for maintenance. Its lightweight 38mm plastic case and durable acrylic glass make it comfortable for all-day wear and resilient against minor impacts. The watch also features a practical 30m water resistance, providing adequate protection against splashes and incidental contact with water.

While the F-91WM-3AEF excels in simplicity and durability, its 30m water resistance means it is not suitable for swimming or showering, which might be a consideration for more active users. Additionally, the acrylic crystal, while impact-resistant, is more prone to scratching compared to harder materials like mineral or sapphire.

Ultimately, the F-91WM-3AEF is an excellent choice for anyone desiring an iconic, no-frills digital watch for everyday use. For those requiring greater water protection or enhanced scratch resistance, exploring models within Casio's G-Shock line or other dedicated sports watches would be a more suitable alternative.