Watch GBM-2100A-1A3ER

The Watch

Since 1946, Casio has continuously pushed the boundaries of watchmaking with unique, timeless designs. Its timepieces are a perfect testament to the brand's generational expertise and versatility, spanning multiple styles that stand out for their elegance. Discover this stunning GBM-2100A-1A3ER, a signature piece from the G-Shock collection. It blends urban design with practical functionality for the ultimate wrist companion. Its octagonal case is crafted from glass-fiber reinforced resin combined with stainless steel, built to stand the test of time. Bold yet comfortable, it measures 49.30 mm long, 44.40 mm wide, and 11.90 mm thick, weighing just 72 g. The case features a polished bezel finished with a circular brushed surface and polished edges for an exquisite, refined result. Functions are controlled by four push buttons on either side of the case, which is topped by a domed mineral crystal. Finally, the screw-locked case back ensures water resistance of 20 ATM.

The Dial

This stunning timepiece is paired with a beautiful round dial in a rich green tone that brings a joyful, glamorous touch to your wrist. Enhanced with a sunray finish, it features an applied oblong grid with a transparent print and circular finishing. The dual digital and analog display makes reading the time effortless. The centrally mounted hands are treated with Neobrite for legibility even at night, pointing to three-dimensional baton indices and a minute railroad track around the perimeter. At 9 o'clock sits a sub-display providing various information. Casio signs its name just below the 12 o'clock index.

The Functions

Bluetooth® Smart

This watch features energy-efficient Bluetooth® technology that syncs data at the press of a button. The Bluetooth® function wirelessly connects the watch to your smartphone, unlocking a wide range of practical features.

Smartphone time

When the watch is paired with a smartphone, the time is set automatically and always displays the correct local time anywhere in the world.

Super Illuminator

At the press of a button, the dial lights up in vibrant, on-trend colors.

Shock Resistance

The shock-resistant structure protects the watch against impacts and vibrations.

Solar Power

Invisible solar cells inside the watch convert light into energy to power all functions. A rechargeable battery provides the capacity needed to keep it running in low-light conditions.

Neobrite Coating

The hands and/or indices feature a fluorescent coating that continues to glow in the dark after the watch has been exposed to a light source.

World Time Function

The world time function displays the local time across 29 different time zones.

1/100-Second Stopwatch - 24 Hours

Measures elapsed time to 1/100th of a second accuracy for up to 24 hours. An audible beep confirms the start and stop of the stopwatch.

Countdown Timers - 1/1 sec - 24 Hours

For those who live by precision: countdown timers alert you to important or recurring events with an audible signal at the set date and time. Countdowns can be programmed in seconds, up to 24 hours in advance.

5 Daily Alarms

A daily audible alarm reminds you of upcoming commitments at your programmed time. This model features five independent alarms so you never miss an important appointment.

Day of the Week Display in Multiple Languages

The day can be displayed in multiple languages of your choice.

Button Beep On/Off

The button beep can be turned off using the mode button. Once disabled, there is no beep when switching between functions. However, any programmed alarms or countdowns remain active after the button beep is turned off.

Hand Movement Function

This function moves the hands when they are blocking the display of the time, date, or stopwatch.

Phone Finder Function

Can't find your smartphone? Just press a button on the watch and your phone will sound an alert.

Auto-Calendar

Once set, the auto-calendar always displays the correct date.

12/24-Hour Time Format

You can display the time in either 12-hour or 24-hour format.

Battery Level Indicator

Displays the current battery level.

The Movement

This beautiful model is powered by a solar movement delivering accurate analog and digital display. A reliable mechanism, it drives the hands, the modes, and the day counter with precision.

The Strap

This stunning strap in black resin is the perfect companion to this beautiful watch. It adds an urban, sporty edge to the piece. Its versatile color pairs effortlessly with any outfit, giving you a modern look that hugs the contours of your wrist with refined elegance. Count on the pin buckle for a perfect, secure fit.

Water Resistance

With water resistance of 200 meters - or 20 ATM, to speak the pure and elegant language of watchmaking - this watch is built for recreational diving. It handles showers, baths, ocean swims, and shallow-water dives (including freediving) without breaking a sweat. For professional scuba diving, however, our Ocarat watch team has handpicked 30 ATM models available in the catalog via a quick search on our site. One last word of advice: keep your hands off the push buttons and crown during any water activity!