Casio GA-100-1A2

Step into a world of power and precision with the Casio G-SHOCK GA-100-1A2. This standout "Big Case" model features a commanding aesthetic defined by its electric blue accents against a matte black resin body. With its massive 35mm diameter face and high-relief hour markers, the GA-100-1A2 creates a three-dimensional depth that is as functional as it is stylish.

Engineered to thrive in extreme environments, this "best seller" combines the classic three-dial face layout with advanced tactical tools, including a 1/1000-second stopwatch and a velocity indicator. Whether you're engaging in extreme sports or professional field work, its anti-slip oversized buttons ensure fast and sure operation even with gloves on.

Key Features

• Three-Dimensional "X-Large" Face: Features raised hour markers and blue dial rings that provide a deep, high-character look with exceptional legibility.
• Ultimate Durability Trio: Built with G-SHOCK’s legendary Shock Resistance, 200-meter Water Resistance, and JIS Class-1 Magnetic Resistance.
• Advanced Chronograph: Equipped with a 1/1000-second stopwatch capable of measuring elapsed time, lap times, and split times for precision performance.
• Velocity Indicator: Calculate speed (up to 1998 units/hour) based on distance input, complete with a Mach indicator for speeds exceeding the sound barrier.
• Tactical Grip: Over-sized buttons feature a checkered anti-slip surface, allowing for confident adjustments during high-intensity activities.
• Auto LED Illumination: The amber LED light features an Auto Light Switch, automatically lighting up the face when you tilt the watch toward your eyes.
• Global Timekeeping: Includes World Time for 48 cities, 5 daily alarms (with one snooze), and a 24-hour countdown timer with auto-repeat.

Specifications at a Glance

• Case Size: 55 × 51.2 × 16.9 mm (Powerful, oversized presence)
• Weight: 70 g
• Battery Life: Approx. 2 years on CR1220
• Accuracy: Around 15 seconds per month
• Glass: Scratch-resistant Mineral Glass