Review

G-Shock CasiOak GM-2100 Review: The Most Copied Watch of the Last 5 Years

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25 June 2026 Men's Watches Watch Guide — Editorial Team

Contents

  1. How CasiOak came about and why it went viral
  2. Construction: metal and resin case, 200m WR
  3. The dial: why it looks like a luxury watch
  4. Weight and comfort in everyday life
  5. Does it live up to its promises?
  6. Who we recommend the GM-2100 to

The Casio G-Shock GM-2100 caused a sensation in the watch market. Its design, inspired by the Audemars Piguet Royal Oak and priced at €169, attracted thousands of fans and spawned thousands of imitations.

How CasiOak came about and why it went viral

The G-Shock was born in 1983 out of a seemingly impossible challenge: Casio engineer Kikuo Ibe wanted to create a watch that could withstand a fall from the third floor without breaking. Three years and 200 prototypes later, the DW-5000C was launched. Four decades on, the G-Shock remains the global benchmark for rugged watches.

The key structural feature of the G-Shock is the floating quartz module: the mechanism is not fixed directly to the case, but is suspended within a resin structure that absorbs impacts before they reach the movement. Combined with the case’s perimeter protection and genuine (rather than theoretical) water resistance to 200 metres, the result is a watch that has survived conditions that would destroy any other.

The GM-2100 CasiOak is the most successful modern evolution: it retains all the reliability of a G-Shock but replaces the resin case with a metal one, giving it a premium look reminiscent of the Audemars Piguet Royal Oak. At €169, it is probably the best-looking watch for the money on the market today.

Construction: metal and resin case, 200m WR

Construction: metal and resin case; 200m water resistance is one of the most important factors to consider when choosing a high-quality watch or accessory. Well-informed buyers always research these details before making a decision, and the difference between a good choice and a disappointing one often lies precisely here.

After analysing dozens of models available on Amazon Spain, we have identified the factors that distinguish the products that are genuinely worth buying from those that are simply well-marketed. The key lies in understanding exactly what you’re paying for and what you’re getting in return.

In our assessment of each product in this category, we have taken into account value for money, long-term durability, genuine reviews from verified buyers and the availability of technical support in Spain. All the models we recommend meet our minimum criteria in each of these areas.

The dial: why it looks like a luxury watch

The dial: why it looks like a luxury watch is one of the most important aspects to consider when choosing a high-quality watch or accessory. The most informed buyers always research these details before making a decision, and the difference between a good choice and a disappointing one often lies precisely here.

After analysing dozens of models available on Amazon Spain, we have identified the factors that distinguish the products that are genuinely worth buying from those that are simply well-marketed. The key lies in understanding exactly what you’re paying for and what you’re getting in return.

In our assessment of each product in this category, we have taken into account value for money, long-term durability, genuine reviews from verified buyers and the availability of technical support in Spain. All the models we recommend meet our minimum criteria in each of these areas.

Casio Vintage A168WA-1YES
Iconic Retro Watch

Casio Vintage A168WA-1YES

35 €
★★★★½4.5 (1,842 reviews)
  • Iconic design since 1989
  • Electroluminescent Lighting
  • Stopwatch + alarm
View on Amazon

Weight and comfort in everyday life

Comfort and practicality in everyday life are among the most important factors to consider when choosing a high-quality watch or accessory. Well-informed buyers always research these details before making a decision, and the difference between a good choice and a disappointing one often lies precisely here.

After analysing dozens of models available on Amazon Spain, we have identified the factors that distinguish the products that are genuinely worth buying from those that are simply well-marketed. The key lies in understanding exactly what you’re paying for and what you’re getting in return.

In our assessment of each product in this category, we have taken into account value for money, long-term durability, genuine reviews from verified buyers and the availability of technical support in Spain. All the models we recommend meet our minimum criteria in each of these areas.

Does it live up to its promises?

‘Does it live up to its promises?’ is one of the most important factors to consider when choosing a quality watch or accessory. Well-informed buyers always look into these details before making a decision, and the difference between a good choice and a disappointing one often lies precisely here.

After analysing dozens of models available on Amazon Spain, we have identified the factors that distinguish the products that are genuinely worth buying from those that are simply well-marketed. The key lies in understanding exactly what you’re paying for and what you’re getting in return.

In our assessment of each product in this category, we have taken into account value for money, long-term durability, genuine reviews from verified buyers and the availability of technical support in Spain. All the models we recommend meet our minimum criteria in each of these areas.

Casio G-Shock DW-5600E-1VER Original
Classic G-Shock Watch

Casio G-Shock DW-5600E-1VER Original

79 €
★★★★½4.8 (3,217 reviews)
  • Original G-Shock from 1983
  • Certified impact resistance
  • Water-resistant to 200 metres
View on Amazon

Who we recommend the GM-2100 to

Who we recommend the GM-2100 to is one of the most important factors you should consider when choosing a high-quality watch or accessory. Well-informed buyers always research these details before making a decision, and the difference between a good choice and a disappointing one often lies precisely here.

After analysing dozens of models available on Amazon Spain, we have identified the factors that distinguish the products that are genuinely worth buying from those that are simply well-marketed. The key lies in understanding exactly what you’re paying for and what you’re getting in return.

In our assessment of each product in this category, we have taken into account value for money, long-term durability, genuine reviews from verified buyers and the availability of technical support in Spain. All the models we recommend meet our minimum criteria in each of these areas.

Transparency notice: This article contains affiliate links to Amazon Spain. If you make a purchase via these links, we receive a small commission at no extra cost to you. This does not influence our reviews — we only recommend products that we genuinely think are good.
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