Casio G-Shock GA-400-1B Big Case Analog-Digital Watch

The Casio G-Shock GA-400-1B stands as a formidable testament to uncompromising toughness and functional design. Part of G-Shock’s celebrated high-impact lineup, this model fuses an eye-catching multi-dimensional dial layout with utilitarian mechanics. Now available through Ranasinghe Watch Works in Sri Lanka, it serves individuals who demand high-performance timekeeping capable of keeping pace with extreme lifestyles, outdoor expeditions, and fast-paced urban environments.

Premium Design

Engineered with a commanding aesthetic, the watch showcases a tactical matte black finish accented by high-visibility details. Its multi-layered structural composition creates a striking three-dimensional depth on the wrist. Designed to turn heads while enduring heavy physical demands, the Casio G-Shock GA-400-1B captures the spirit of modern industrial design without sacrificing ergonomic comfort.

Dial Features

The dial integrates a dynamic analog-digital display configuration, offering the classic readability of traditional hands alongside the precision of digital readouts. A standout feature is the oversized rotary switch positioned at the 3 o'clock mark, which allows users to smoothly cycle through countdown timers, world time settings, and alarms. Furthermore, an amber LED light with an auto-light switch and selectable afterglow ensures optimal visibility during night-time operations. A handy hand-shift feature temporarily retracts the analog hands out of the way whenever they obstruct the digital sub-screens.

Case Features

At the core of its toughness is a heavy-duty resin case measuring 55 × 51.9 × 18.3 mm. Built for extreme environments, the structure features G-Shock’s signature Shock Resistance and Magnetic Resistance, protecting internal modules from severe drops, impacts, and magnetic fields generated by electronic equipment. A tough mineral glass window shields the dial from scratches and abrasions during rugged field use.

Movement

Powered by a reliable Japanese quartz movement module, the watch guarantees precision timekeeping within an accuracy range of $\pm 15$ seconds per month. The robust dual-power electronic architecture relies on dependable batteries (SR927W × 2) designed to deliver approximately 3 years of continuous operation.

Strap/Bracelet

The watch is secured via a flexible, high-grade black resin strap designed to resist sweat, moisture, and UV degradation. Fitted with a secure buckle clasp, the band conforms comfortably to various wrist sizes while maintaining a tight, slip-proof grip during high-intensity physical training or aquatic sports.

Water Resistance

With an exceptional 200-meter water resistance rating, the Casio G-Shock GA-400-1B is fully equipped for professional marine activity, recreational scuba diving, swimming, and water sports. Users can transition seamlessly from torrential rain to deep-water environments with complete confidence.

Comfort

Despite its formidable visual presence and large proportions, the watch weighs a mere 70 grams. The lightweight resin composition distributes weight evenly across the wrist, preventing fatigue during prolonged daily wear.

Ideal For

This timepiece is custom-built for athletes, fitness enthusiasts, military personnel, adventure travelers, and streetwear aficionados across Sri Lanka who require a rugged, zero-compromise wrist instrument that matches their dynamic lifestyle.

Why Buy From Ranasinghe Watch Works

Purchasing your Casio G-Shock GA-400-1B from Ranasinghe Watch Works guarantees 100% genuine products backed by a rich trading heritage established in 1931. As a trusted market leader in Sri Lanka, we provide expert customer service, verified manufacturer warranties, and secure shopping experiences for watch collectors nationwide.

Conclusion

The Casio G-Shock GA-400-1B merges tactical resilience with innovative controls, making it an indispensable asset for daily wear and extreme adventures alike. Secure yours today from Ranasinghe Watch Works and elevate your wrist game with a legend of durability.

PRODUCT HIGHLIGHTS

• Genuine Casio G-Shock big case design with an intuitive rotary switch control

• Exceptional Shock Resistance built to withstand heavy impacts and drops

• Advanced Magnetic Resistance preventing operational disruption from external magnetic fields

• Professional 200-meter water resistance rating suited for swimming and water sports

• Multi-dimensional analog-digital hybrid dial configuration

• Amber LED light featuring an auto-light switch and selectable afterglow duration

• World time functionality supporting 31 time zones (48 cities + UTC)

• High-precision 1/100-second stopwatch and flexible countdown timer

• 5 daily independent alarms including 1 snooze alarm option

• Lightweight, skin-friendly black resin band ensuring long-term wearing comfort

KEY FEATURES

• Brand: Casio

• Model: GA-400-1B

• Gender: Men's / Unisex

• Collection: G-Shock Analog-Digital Series

• Movement: Quartz (Battery-Powered)

• Display: Analog-Digital

• Glass: Mineral Glass

• Case Material: Resin

• Band Material: Resin

• Band Color: Black

• Dial Color: Black

• Case Diameter: 55 × 51.9 mm

• Case Thickness: 18.3 mm

• Weight: 70 g

• Water Resistance: 200 Meters (20 Bar)

• Calendar: Full Auto-Calendar up to year 2099

• Battery: SR927W × 2 (Approx. 3-year battery life)

• Warranty: Ranasinghe Watch Works Official Warranty

• Country of Origin: Japan design / Manufactured in authorized overseas facilities

BUYING REASONS

1. Legendary Durability: Built with signature G-Shock shock and magnetic resistance to survive extreme conditions.

2. Innovative Rotary Switch: Simplifies mode navigation and settings adjustments with effortless physical turns.

3. Deep Water Performance: Certified 200-meter water resistance handles swimming, snorkeling, and aquatic expeditions.

4. Dual Time Versatility: World time feature covers 31 time zones across 48 global cities plus UTC.

5. Practical Daily Tools: Includes 5 daily alarms, countdown timers, and a 1/100-second stopwatch for performance tracking.

6. Enhanced Legibility: Features a hand-shift function that moves analog hands out of the digital window path instantly.

7. Comfortable Wearability: Lightweight 70g build reduces wrist strain during high-impact activities.

8. Trusted Heritage: Backed by Ranasinghe Watch Works, serving Sri Lanka with authentic timepieces since 1931.

9. Low Maintenance: Long-lasting dual battery system provides up to 3 years of continuous reliability.

10. Bold Urban Style: Striking matte black chassis pairs seamlessly with casual and tactical streetwear.

SHOP MORE CASIO

• Casio Collection: https://ranasinghewatchworks.lk/product?type=watch&brand=casio

LAERN MORE ABOUT THIS WATCH

• Official Casio Product Page: https://www.casio.com/sg/watches/gshock/product.GA-400-1B/

FAQ

1. Is the Casio G-Shock GA-400-1B original?

Yes, every timepiece sold at Ranasinghe Watch Works is 100% authentic, brand new, and backed by official warranty support in Sri Lanka.

2. What is the case size of the GA-400-1B?

The watch features a case dimension of 55 × 51.9 mm with a thickness of 18.3 mm.

3. Can I swim or dive with this watch?

Yes, it features a 200-meter (20 bar) water resistance rating, making it suitable for swimming, recreational scuba diving, and water sports.

4. What powers the Casio GA-400-1B?

It operates on two SR927W batteries with an approximate life span of 3 years under normal usage conditions.

5. Does this model feature an LED light?

Yes, it comes equipped with an amber-colored LED light featuring an auto-light switch and selectable afterglow duration.

6. What is the rotary switch used for?

The large rotary switch located at the 3 o'clock position allows for fast, intuitive adjustments of countdown timers, world time settings, and alarms.

7. Does the watch protect against magnetic fields?

Yes, the GA-400-1B is built with ISO-compliant magnetic resistance to prevent time distortion near magnetic sources.

8. How much does the watch weigh?

The watch weighs approximately 70 grams, ensuring a balanced, lightweight wrist feel.

9. Where can I service or buy Casio watches in Sri Lanka?

You can purchase and service authentic Casio watches directly through Ranasinghe Watch Works, operating trusted stores and online channels across Sri Lanka since 1931.

10. Does it come with a warranty?

Yes, purchases through Ranasinghe Watch Works include an official warranty covering manufacturing defects.