---
product_id: 686053467
title: "GMAS2100-1A"
brand: "g-shock"
price: "€ 161.40"
currency: EUR
in_stock: true
reviews_count: 13
category: "G Shock"
url: https://www.desertcart.pt/products/686053467-gmas2100-1a
store_origin: PT
region: Portugal
---

# 200m water resistance carbon core guard, ultra-light & durable 1/100-sec stopwatch precision GMAS2100-1A

**Brand:** g-shock
**Price:** € 161.40
**Availability:** ✅ In Stock

## Summary

> 🖤 Timeless toughness meets sleek style — own the moment, effortlessly.

## Quick Answers

- **What is this?** GMAS2100-1A by g-shock
- **How much does it cost?** € 161.40 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/686053467-gmas2100-1a)

## Best For

- g-shock enthusiasts

## Why This Product

- Trusted g-shock brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Functionality:** World time, stopwatch, countdown timer & 5 alarms keep you on top of your busy schedule.
- • **Unmatched Durability:** Shock resistant and 200-meter water resistance means it’s ready for anything.
- • **Effortless All-Day Wear:** Lightweight carbon/resin build ensures comfort from meetings to workouts.
- • **Sleek Powerhouse Design:** Downsized GA-2100 with a slim, compact profile perfect for professional wrists.
- • **Chic Monochrome with a Twist:** Black resin strap paired with rose gold accents for subtle, office-ready flair.

## Overview

The Casio G-Shock GMAS2100-1A is a compact, lightweight watch featuring a carbon core guard structure for enhanced durability. It offers shock resistance, 200-meter water resistance, and a stylish black resin band with rose gold accents. Equipped with analog-digital display, 1/100-second stopwatch, world time across 31 zones, countdown timer, and multiple alarms, it’s designed for professionals seeking a blend of rugged functionality and refined aesthetics.

## Description

From Casio G-Shock, this new GMAS2100 watch is a downsized version of the GA-2100 model. It is slim, lightweight, and compact in design and boasts a chic, monochromatic look. The octagonal bezel, flat face, simple bar hour markers, and carbon core guard structure that are distinctive features of the GA-2100 are now available in a compact configuration. The black resin strap and matching dial with rose gold-tone accents adds a feminine pop of color to this new style.Shock Resistant200-meter water resistanceCarbon Core Guard structureCase/bezel material: Carbon/ResinBlack Resin BandMineral Glass Neobrite Double LED light LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)World time - 31 time zones1/100-second stopwatchCountdown timer5 daily alarmsHourly time signalHand shift featureFull auto-calendar (to year 2099)12/24-hour formatButton operation tone on/offRegular timekeepingSize of case : 46.2?42.9?11.2mmCasio Style #: GMAS2100-1A

Review: ez to use and looks good - fire
Review: Great watch for wife - My wife wanted another G shock but she doesn't like Baby G shocks and she wanted something that was fitting for her work place. She saw these come out and she liked the black one. I bought it as a gift and it 100% met her expectations. It's a good size for a small wrist. It doesn't say Baby G on it which is a turn off for some people. The black is a nice shade for a clean look and the rose gold like accents give the watch a little something so it fits in well in a work environment and jewelry coordination. If it was like the all black larger version it would be too tacti-cool for some settings. It's super light and it reads well. This watch definitely fulfills every bit of its specs, advertising and online appearance. Sometimes it's hard to tell how a watch will look in person and on the wrist but this one was spot on. If you are liking it but are unsure, spring for it. It meets the hype, and some.

## Features

- From Casio G-Shock, this new GMAS2100 watch is a downsized version of the GA-2100 model
- It is slim, lightweight, and compact in design and boasts a chic, monochromatic look

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08ZDPZZFP |
| Additional Features | Shock Resistant, Timer, World Time, light, stop-watch |
| Age Range Description | Adult |
| Band Color | Black |
| Band Material Type | Resin |
| Band Width | 24 |
| Bands | 1 |
| Best Sellers Rank | #367,083 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1,020 in Women's Wrist Watches |
| Brand Name | G-Shock |
| Case Diameter | 42 millimeters |
| Case Material Type | Carbon/Resin |
| Case Thickness | 11 millimeters |
| Character | fashion |
| Clasp Type | Buckle |
| Clasp type | Buckle |
| Closure Type | Buckle |
| Crystal | mineral |
| Customer Reviews | 4.2 out of 5 stars 264 Reviews |
| Dial Color | Black |
| Display | Analog-Digital |
| Embellishment Feature | Crystal |
| Face Style | Crosshair (possible other styles: Teaked, Linen) |
| Gem type | No Gemstone |
| Included Components | Band |
| Item Type Name | Sport Watch |
| Item Weight | 4.8 ounces |
| Item type name | Sport Watch |
| Item width | 5 inches |
| Manufacturer | G-Shock |
| Manufacturer Part Number | GMAS2100-1A |
| Metal type | Black Gold |
| Model Name | Casio G Shock |
| Model Number | GMAS2100-1A |
| Number of Items | 1 |
| Pattern | Solid |
| Power Source | Battery Powered |
| Series Number | 2100 |
| Shape | Octagonal |
| Sport Type | Multi-Sport |
| Strap Type | Two Piece Strap |
| Style Name | Watches |
| Theme | Sports |
| UPC | 889232300252 |
| Unit Count | 1 Count |
| Warranty Type | Manufacturer |
| Watch Movement Type | Japanese Quartz |
| Water Resistance Depth | 30 meters |
| Water Resistance Level | Water Resistant |

## Images

![GMAS2100-1A - Image 1](https://m.media-amazon.com/images/I/81t1YBvN-sL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ ez to use and looks good
*by S***. on July 31, 2026*

fire

### ⭐⭐⭐⭐⭐ Great watch for wife
*by A***Y on July 14, 2021*

My wife wanted another G shock but she doesn't like Baby G shocks and she wanted something that was fitting for her work place. She saw these come out and she liked the black one. I bought it as a gift and it 100% met her expectations. It's a good size for a small wrist. It doesn't say Baby G on it which is a turn off for some people. The black is a nice shade for a clean look and the rose gold like accents give the watch a little something so it fits in well in a work environment and jewelry coordination. If it was like the all black larger version it would be too tacti-cool for some settings. It's super light and it reads well. This watch definitely fulfills every bit of its specs, advertising and online appearance. Sometimes it's hard to tell how a watch will look in person and on the wrist but this one was spot on. If you are liking it but are unsure, spring for it. It meets the hype, and some.

### ⭐⭐⭐⭐⭐ Great
*by A***Y on June 25, 2026*

Great, just didn’t come with the original box, but it’s an original watch

## Frequently Bought Together

- G-Shock GMAS2100-1A
- G-Shock GA-2100 Series Watch

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---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-08-31*