---
product_id: 367826846
title: "GMAS2100-1A"
brand: "g-shock"
price: "฿11744"
currency: THB
in_stock: true
reviews_count: 5
category: "G Shock"
url: https://www.desertcart.co.th/products/367826846-gmas2100-1a
store_origin: TH
region: Thailand
---

# 200m water resistance carbon core guard for ultra durability 1/100-second stopwatch precision GMAS2100-1A

**Brand:** g-shock
**Price:** ฿11744
**Availability:** ✅ In Stock

## Summary

> 🖤 Compact toughness meets chic style — own the moment with GMAS2100-1A

## Quick Answers

- **What is this?** GMAS2100-1A by g-shock
- **How much does it cost?** ฿11744 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/367826846-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

- • **Global Ready:** World time across 31 zones keeps you connected wherever business or pleasure takes you
- • **All-Day Visibility:** Dual Super Illuminator LED lights with adjustable duration keep you on time, anytime
- • **Unmatched Durability:** Carbon core guard structure ensures shock resistance for your active lifestyle
- • **Slim & Sleek Powerhouse:** Downsized GA-2100 design fits perfectly on any wrist without bulk
- • **Effortless Functionality:** Full auto-calendar, 5 alarms, stopwatch, and countdown timer streamline your day

## Overview

The Casio G-Shock GMAS2100-1A is a compact, lightweight watch featuring a durable carbon core guard structure, 200-meter water resistance, and a sleek monochromatic design with rose gold accents. Equipped with precise 1/100-second stopwatch, dual LED Super Illuminator lights, and world time for 31 zones, it blends rugged functionality with refined style for the modern professional.

## 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: Good
Review: Awesome

## 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 |
| Batteries  | 1 LR44 batteries required. |
| Customer reviews | 4.4 4.4 out of 5 stars (230) |
| Date First Available  | 18 Mar. 2021 |
| Department  | Watches |
| Is discontinued by manufacturer  | No |
| Item model number  | GMAS2100-1A |
| Manufacturer  | G-Shock |
| Product Dimensions  | 20.32 x 12.7 x 12.7 cm; 150 g |

## Images

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by S***U on 25 September 2023*



### ⭐⭐⭐⭐⭐ Awesome
*by D***D on 12 January 2026*



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



## Frequently Bought Together

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

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**Shop now:** [https://www.desertcart.co.th/products/367826846-gmas2100-1a](https://www.desertcart.co.th/products/367826846-gmas2100-1a)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-05*