Casio Men’s GA-100 XL Series G-Shock Quartz 200M WR Shock

Product Overview

The Casio Men’s GA-100 XL Series G-Shock Quartz Watch is engineered for those who require a timepiece that can endure the toughest conditions without compromising on functionality or presence. Trusted by military personnel, law enforcement officers, surfers, and outdoor adventurers worldwide, this watch embodies the core G-Shock philosophy: absolute toughness. Its oversized, rugged design isn’t just for show—it’s built to protect the internal mechanisms from real-world impacts. Whether you’re navigating rough terrain, diving into ocean waves, or facing daily wear and tear, the GA-100 delivers consistent, reliable performance. This is a watch designed not just to survive, but to thrive in environments where lesser timepieces would fail.

Key Features

• Shock-Resistant Construction – At the heart of every G-Shock is its signature shock resistance. The GA-100 is specifically engineered to absorb and disperse impact energy from drops, bumps, and vibrations. This protection ensures the watch continues to function accurately even after sudden jolts—making it ideal for high-intensity activities, field operations, or any situation where durability is non-negotiable.
• 200-Meter Water Resistance (20-Bar) – With a water resistance rating of 200 meters (equivalent to 20-bar pressure), this watch is more than capable of handling immersion in water. It’s suitable for swimming, surfing, jet skiing, and other recreational water sports. You can confidently wear it while showering, washing your hands, or caught in heavy rain—no need to remove it during daily water exposure.
• Electroluminescent Backlight – When light is scarce, the electroluminescent backlight activates to illuminate the watch face, providing clear visibility in dark environments. This feature is essential for nighttime activities, early morning workouts, or tactical operations where readability can’t be compromised. A simple button press activates the glow, ensuring you’re never left in the dark.
• Oversized XL Design – The GA-100 features a bold, large-format case that commands attention. Its substantial size enhances readability and reinforces its rugged identity, making it a standout choice for those who prefer a watch with presence. The design balances functionality with a sporty, masculine aesthetic that suits active lifestyles and everyday wear alike.
• Quartz Movement – Powered by precision quartz technology, the watch maintains accurate timekeeping with minimal drift. It operates on a single lithium metal battery (included), which provides long-lasting power with infrequent replacement needs. This reliable movement ensures you stay on schedule, whether you’re in the office or on a remote expedition.

Technical Specifications

• Model Number: GA100B-7A
• Department: Men’s
• Product Dimensions: 6 x 6 x 7 inches; 5.93 ounces
• Battery: 1 Lithium Metal battery required (included)
• Water Resistance: 200 meters (20-bar)
• Movement: Quartz
• Shock Resistance: Yes
• Backlight: Electroluminescent
• Manufacturer: Casio America Inc.
• ASIN: B005OS7O8E
• Date First Available: September 22, 2011
• Manufacturer’s Warranty: Available upon request from customer service

Benefits & Use Cases

The GA-100 XL Series G-Shock is purpose-built for individuals who operate in demanding environments. Military and law enforcement professionals rely on its shock resistance and water durability during field missions, training exercises, and daily duty. Outdoor enthusiasts—including hikers, campers, and climbers—benefit from its ability to withstand rough handling, drops, and exposure to the elements. Surfers and water sports participants appreciate the 200-meter water resistance, which allows for safe use in oceans, pools, and fast-moving water. The electroluminescent backlight proves invaluable during night hikes, emergency situations, or early morning starts when visibility is low. Beyond extreme use, the watch transitions effortlessly into everyday life, offering a durable, no-nonsense companion for work, travel, or casual wear. Its combination of resilience, functionality, and bold design makes it a trusted tool for those who live life on the move.

Important Notes

This model is not discontinued and remains in active production by Casio. It includes one lithium metal battery and is supported by a manufacturer’s warranty, which can be obtained by contacting Casio customer service directly. While the watch is built to endure extreme conditions, users should avoid prolonged exposure to strong magnetic fields or temperatures outside its operational range to preserve long-term performance. To maintain water resistance, always ensure the crown is fully tightened before submersion. Proper care and handling will ensure the watch continues to perform reliably for years to come.