---
product_id: 151104217
title: "G-Shock GA-2100-1A1ER Analogue-Digital Quartz Watch with Black Resin Case, Silicone Strap, 200 Metre Water Resistance, Stopwatch World Time Timer, 45.40 mm"
brand: "casio"
price: "A$260"
currency: AUD
in_stock: true
reviews_count: 13
category: "Casio"
url: https://www.desertcart.com.au/products/151104217-g-shock-ga-2100-1a1er-analogue-digital-quartz-watch-black
store_origin: AU
region: Australia
---

# World time + stopwatch Black resin & silicone build 200m water resistance G-Shock GA-2100-1A1ER Analogue-Digital Quartz Watch with Black Resin Case, Silicone Strap, 200 Metre Water Resistance, Stopwatch World Time Timer, 45.40 mm

**Brand:** casio
**Price:** A$260
**Availability:** ✅ In Stock

## Summary

> 🖤 Timeless toughness meets modern tech — own the moment with G-Shock GA-2100!

## Quick Answers

- **What is this?** G-Shock GA-2100-1A1ER Analogue-Digital Quartz Watch with Black Resin Case, Silicone Strap, 200 Metre Water Resistance, Stopwatch World Time Timer, 45.40 mm by casio
- **How much does it cost?** A$260 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/151104217-g-shock-ga-2100-1a1er-analogue-digital-quartz-watch-black)

## 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

- • **Global Timekeeper:** Stay effortlessly synced worldwide with built-in world time, stopwatch, timer, and alarm functions.
- • **Dual Display Mastery:** Seamlessly blends analogue elegance with digital precision for versatile timekeeping on the go.
- • **Unmatched Durability:** Engineered with shock-resistant black resin and a sleek silicone strap for all-day comfort and resilience.
- • **Dive-Ready Performance:** Waterproof up to 200 metres—perfect for swimming, diving, and conquering any aquatic adventure.
- • **Lightweight Powerhouse:** At just 150 grams, experience robust quartz accuracy without the bulk—your perfect everyday companion.

## Overview

The Casio G-Shock GA-2100-1A1ER is a unisex analogue-digital quartz watch featuring a 45.40 mm black resin case and silicone strap. It offers 200 metres of water resistance, stopwatch, world time, timer, and alarm functions, powered by a lithium manganese dioxide battery. Combining rugged durability with sleek design, this lightweight 150-gram timepiece is ideal for active professionals seeking reliable performance from boardroom to beach.

## Description

Casio presents the G-Shock GA-2100-1A1ER, an analogue-digital quartz watch designed for men seeking reliable timekeeping with sports functionality. This unisex timepiece features a 45.40 mm black resin case paired with a black silicone strap, creating a cohesive design suitable for casual, formal, hiking, running, swimming activities. The watch combines traditional analogue hands with digital display elements, providing multiple timing functions in one device weighing 150 grams.The GA-2100-1A1ER operates on quartz movement powered by lithium manganese dioxide battery. The watch offers 200 metre water resistance, making it suitable for swimming water sports. Functional features include stopwatch capability, world time display, timer alarm functions with light feature for daytime nighttime commuting use. The resin case material with silicone strap provides impact resistance whilst maintaining durability. Model number GA-2100-1A1ER, part number GA-2100-1A1DR, series 2100.This G-Shock model is part of Casio's sports-themed collection, designed for fitness, running other active uses. The watch serves casual wear, formal wear, hiking, running, swimming purposes for adult men. The black colour scheme 45.40 mm case diameter provide clear visibility of both analogue digital displays. The battery powered design ensures consistent performance across various activities from commuting to sports.

Review: Casio watch - Cool watch easy to set looks great
Review: Great watch - Love it. Gteat watch, very durable. Light weight, approx 40mm design Light has two setting for duration. Very comfortable

## Features

- Materials: Black resin case with silicone strap construction, 45.40 mm case diameter, quartz movement type, lithium manganese dioxide battery powered, 150 grams
- Design Features: Analogue-digital display combining traditional watch face with digital functions, black colour scheme, unisex design suitable for men
- Functionality: Stopwatch, world time, timer, alarm functions with light feature for daytime nighttime use, waterproof to 200 metres depth for swimming running
- Specifications: Model number GA-2100-1A1ER, part number GA-2100-1A1DR, series 2100, 200 metre water resistance level, battery powered quartz movement
- Care Instructions: Suitable for casual wear, formal wear, hiking, running, swimming, fitness activities, part of the G-Shock sports collection series

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07WGJ1JNW |
| ASIN  | B07WGJ1JNW |
| Age Range Description | Adult |
| Band Colour | Black |
| Band Length | 22 Centimetres |
| Band Material Type | Resin |
| Band Width | 25 Millimetres |
| Bands | 1 |
| Batteries  | 1 Lithium Metal batteries required. |
| Best Sellers Rank | 67,008 in Fashion ( See Top 100 in Fashion ) 342 in Men's Wrist Watches |
| Brand Name | Casio |
| Case Diameter | 42 Millimetres |
| Case Material Type | Resin |
| Case Thickness | 11.8 Millimetres |
| Character | No aplica |
| Clasp Type | Buckle |
| Closure Type | Buckle |
| Country Of Origin | Thailand |
| Country of origin  | Thailand |
| Crystal | Mineral |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,154) |
| Customer reviews | 4.6 4.6 out of 5 stars (3,154) |
| Date First Available  | 20 Aug. 2019 |
| Department  | unisex |
| Dial Color | black |
| Display | Analog-Digital |
| Embellishment Feature | Crystal |
| Face Style | Crosshair |
| Global Trade Identification Number | 04549526241659 |
| Included Components | 1 package |
| Is discontinued by manufacturer  | No |
| Item Shape | Round |
| Item Type Name | Watch |
| Item Weight | 30 Grams |
| Item model number  | GA-2100-1A1DR |
| Language  | English |
| Manufacturer | Casio |
| Manufacturer  | Casio |
| Model Name | GA-2100-1A1ER |
| Model Number | GA-2100-1A1DR |
| Pattern | Solid |
| Power Source | Battery Powered |
| Product Dimensions  | 10 x 10 x 5 cm; 30 g |
| Series Number | 2100 |
| Sport Type | Diving |
| Strap Type | Silicone Strap |
| Style Name | GA-2100-1A1ER-AMZUK |
| Unit Count | 1.00 count |
| Warranty Type | Manufacturer |
| Watch Movement Type | Quartz |
| Water Resistance Depth | 200 Metres |
| Water Resistance Level | Waterproof |

## Images

![G-Shock GA-2100-1A1ER Analogue-Digital Quartz Watch with Black Resin Case, Silicone Strap, 200 Metre Water Resistance, Stopwatch World Time Timer, 45.40 mm - Image 1](https://m.media-amazon.com/images/I/61g6yHKxg0L.jpg)

## Questions & Answers

**Q: How many alarms has the watch?**
A: I think 5 but not 100%

**Q: Are these genuine? I had  replica sent to me before (different company). Apparently they're rife.**
A: the ones we sell are 100 percent  genuine

**Q: Does this watch change time automatically when clocks go back/forward.**
A: No, you have to change it manually. It’s fairly straightforward to do.

**Q: Does it comes with international warranty card? How long is the warranty? Thanks**
A: Yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ Casio watch
*by M***N on 7 December 2025*

Cool watch easy to set looks great

### ⭐⭐⭐⭐⭐ Great watch
*by D***S on 9 January 2026*

Love it. Gteat watch, very durable. Light weight, approx 40mm design Light has two setting for duration. Very comfortable

### ⭐⭐⭐⭐⭐ Excellent budget watch
*by D***L on 4 September 2025*

Very good watch, I use it daily and had no issues

## Frequently Bought Together

- Casio Gents 45.40mm Quartz Watch with Black Analogue - Digital dial and Black Plastic/Resin Strap Strap GA-2100-1A1ER
- Casio GA-2100-1AER G-Shock Carbon Core Octagon Series Watch -Black
- Casio Ga-2100-1a4er Watch One Size

---

## 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.com.au/products/151104217-g-shock-ga-2100-1a1er-analogue-digital-quartz-watch-black](https://www.desertcart.com.au/products/151104217-g-shock-ga-2100-1a1er-analogue-digital-quartz-watch-black)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-08*