Casio GD-100-1A

Built for extreme durability and heavy-duty performance, the Casio G-Shock GD-100-1A offers a large-case digital design built to withstand the toughest conditions. Featuring a stealthy black resin construction, high-intensity LED backlighting, and world time features, this tactical timepiece delivers essential utility with undeniable street style.

The defining characteristic of the GD-100-1A is its oversized, multi-window digital face illuminated by a high-brightness "Super Illuminator" auto LED light. Designed for immediate legibility, the screen features clear digital readouts and distinct graphic indicators that remain visible even in total darkness.

Key Features

• High-Intensity Super Illuminator LED: Outfitted with an ultra-bright auto LED backlight with selectable illumination duration (1.5 or 3 seconds) and afterglow.
• Signature Shock Resistant Structure: Engineered with G-Shock's core protective casing to safeguard internal components against severe impacts, drops, and vibrations.
• 200-Meter Water Resistance: Rated to 20 Bar depth resistance, making it fully suitable for high-impact water sports, swimming, and scuba diving.
• Multi-Time (4 Different Cities): Allows rapid switching and simultaneous tracking of time across 4 selectable home/world cities.
• 7-Year Battery Life: Powered by a high-capacity power system engineered to deliver approximately 7 years of continuous operational power.
• Flash Alert Feature: Flashes with a buzzer sound for alarms, hourly time signals, and countdown timer progress alerts.

Specifications at a glance

• Brand / Line: Casio G-Shock
• Model / Product Code: GD-100-1A
• Case Size: 55 × 51.2 × 17.4 mm
• Total Weight: 72 g
• Case & Bezel Material: Resin
• Band Material: Black Resin Band
• Glass Type: Mineral Glass
• Water Resistance: 200 Meters (20 Bar)
• Battery Type & Life: CR2025 (Approx. 7 years)
• Precision Accuracy: ±15 seconds per month

Operational Breakdown: Functions & Features

World Time Capabilities:
Features World Time covering 31 time zones across 48 cities, with daylight saving time toggle and city code display for effortless global tracking.

Stopwatch & Countdown Timer:
Includes a 1/100-second stopwatch (measuring up to 23:59'59.99") with elapsed and split time modes, alongside a 24-hour countdown timer with 1-second setting intervals.