Casio G-SHOCK GA-100 Series – Model GA100GGB-1A9

The G-SHOCK GA100GGB-1A9 delivers rugged performance in a bold black-and-gold design. Built for durability with G-SHOCK’s shock-resistant construction, this timepiece combines function, toughness, and standout styling. Its all-black resin case and band are accented with gold-colored vapor deposition and a gold mirror LCD, giving the watch a confident, powerful presence.

With a large 55 × 51.2 × 16.9 mm case, the GA100GGB-1A9 offers a commanding wrist presence while remaining lightweight at 72 g. Engineered for precision, it features magnetic resistance, 200-meter water resistance, and a wide range of advanced timing functions designed for both professional use and everyday wear.

Design Overview

The GA100GGB-1A9 showcases G-SHOCK’s iconic oversized case profile with gold accents that highlight its bold aesthetic. The mineral glass crystal, resin band, and glossy coating enhance durability and comfort, while the amber LED light ensures visibility in any environment.

Key Highlights

✔ Striking black-and-gold finish with vapor deposition accents
✔ Shock-resistant and magnetic-resistant construction
✔ 200-meter water resistance for versatile use
✔ Oversized case design with gold mirror LCD
✔ LED Amber light with auto light switch and selectable duration
✔ World Time with 29 time zones (48 cities + UTC)
✔ 1/1000-second stopwatch with speed and distance measurement
✔ Countdown timer up to 24 hours
✔ 5 daily alarms + hourly time signal
✔ Approx. 2-year battery life on CR1220

Features & Specifications

Case & Dimensions

• Size: 55 × 51.2 × 16.9 mm

• Weight: 72 g

• Material: Resin case and bezel

• Band: Resin band

• Construction: Shock resistant, magnetic resistant

Crystal & Exterior

• Glass: Mineral glass

• Compatible Band Size: 145–215 mm

Movement & Battery

• Power: CR1220 battery

• Battery Life: Approx. 2 years

• Accuracy: ±15 seconds per month

Water Resistance

• 200 meters (20 bar)

Functions

• World Time: 29 time zones, 48 cities + UTC, DST on/off

• Stopwatch: 1/1000-second with elapsed time, lap time, split time, speed (0–1998 units/hour), distance input, and Mach indicator

• Countdown Timer: 1 second to 24 hours, auto-repeat

• Alarms: 5 daily alarms (1 with snooze), hourly time signal

• Calendar: Full auto-calendar (to year 2099)

• Lighting: LED amber light with selectable duration (1.5 or 3 seconds), afterglow

• Timekeeping:

  • Analog: 2 hands (hour, minute; hand moves every 20 seconds)

  • Digital: Hour, minute, second, pm, month, date, day

  • 12/24-hour format

Summary

The Casio G-SHOCK GA100GGB-1A9 embodies the brand’s rugged spirit with a striking black-and-gold aesthetic. With its oversized design, advanced stopwatch and timer functions, and 200-meter water resistance, it is the ideal watch for those who demand both resilience and style.

For more details, visit the official Casio G-SHOCK website here.

Warranty:

• The watch is covered by a CASIO Official warranty, providing assurance and protection for your purchase.

▶︎Processing Time & Shipping Policy
▶︎Refund policy
▶︎We only carry G-SHOCK USA products.
▶︎Unfortunately, we DO NOT ship internationally.