Product Overview
The Casio G-Shock GA-2100 Series Analog-Digital Black Resin Watch combines rugged durability with a sleek, modern design inspired by the original 1983 G-Shock DW5000C. Built for those who demand toughness without sacrificing style, this watch features a slim 11.8mm profile—making it one of the thinnest analog-digital models in the G-Shock lineup. Its octagonal bezel pays homage to the brand’s heritage while delivering a contemporary look that transitions easily from outdoor adventures to everyday wear. Engineered with a Carbon Core Guard structure and shock-resistant construction, the GA2100-1A is designed to withstand harsh conditions while maintaining precision and reliability. Whether you’re an active professional, outdoor enthusiast, or simply appreciate durable timepieces, this watch offers dependable performance in a compact, lightweight package.
Key Features
- Shock Resistant Construction: Built to endure impacts and rough handling, this watch maintains functionality even under extreme physical stress thanks to G-Shock’s signature shock-absorbing design.
- Carbon Core Guard Structure: The case incorporates a highly rigid fine resin reinforced with carbon fiber, enhancing strength while keeping the watch lightweight and slim at just 11.8mm thick.
- 200-Meter Water Resistance: Suitable for swimming, snorkeling, and water sports, the watch is fully protected against submersion up to 200 meters.
- Analog-Digital Display: Combines the classic look of analog hands with the practicality of a digital screen, offering dual time formats in a single, easy-to-read interface.
- World Time Function: Access time in 31 time zones across 48 cities, with coordinated universal time and daylight saving adjustments for travelers and global professionals.
- 1/100-Second Stopwatch: Ideal for timing events with precision, featuring split-time measurement for athletic training or professional use.
- Countdown Timer: Set countdowns up to 24 hours for workouts, cooking, or timed activities with audible alerts at completion.
- 5 Daily Alarms: Stay on schedule with five independent alarm settings, each customizable for different daily routines.
- Double LED Light: Illuminates both the analog dial and digital display for clear visibility in low-light conditions.
- Hand Shift Feature: Temporarily moves analog hands out of the way for an unobstructed view of the digital display when needed.
- Full Auto-Calendar: Pre-programmed until the year 2099, eliminating the need for manual date adjustments.
- Battery Life: Powered by two SR726W batteries with an approximate lifespan of 3 years under normal use.
Technical Specifications
- Case Size: 48.5 mm (length) × 45.4 mm (width) × 11.8 mm (thickness)
- Weight: 51 grams
- Case & Bezel Material: Carbon-reinforced fine resin
- Band Material: Resin
- Crystal: Mineral Glass
- Water Resistance: 200 meters
- Power Source: SR726W × 2 batteries
- Battery Life: Approximately 3 years
- Time Format: 12/24-hour selectable
- Additional Functions: Button operation tone on/off, daylight saving time adjustment, world time, stopwatch, countdown timer, 5 alarms, double LED light, hand shift, full auto-calendar
Benefits & Use Cases
The GA2100-1A is ideal for individuals who need a reliable watch that performs under pressure. Its shock-resistant build and 200-meter water resistance make it suitable for outdoor sports, water activities, and demanding work environments. The slim profile and lightweight design ensure comfort during extended wear, whether at the office, gym, or on a hiking trail. Frequent travelers benefit from the world time function, allowing quick reference to multiple time zones. The analog-digital hybrid display appeals to users who want both traditional aesthetics and modern functionality. With long battery life and minimal maintenance, this watch is built for daily use across diverse lifestyles.
Important Notes
This watch is part of the G-Shock GA-2100 series and carries the model number GA2100-1A. It was first made available on October 31, 2024, and is manufactured by G-Shock. The product dimensions are 4.45 x 3.66 x 3.39 inches, and it weighs 5.6 ounces. For warranty details, customers are directed to the manufacturer’s official support resources. Care should be taken to avoid prolonged exposure to chemicals or extreme temperatures. Regular cleaning with a soft cloth and mild soap is recommended to maintain the resin band and case finish.



