Casio G-Shock GA-100-1A4 – Men’s Ana-Digi Sport Watch with Black Dial

Casio G-Shock GA-100-1A4 Watch:

The Casio G-Shock GA-100-1A4 is a bold, high-performance men's ana-digital watch engineered to withstand heavy impacts, vibration, and demanding environments. Built with an oversized black resin case, striking red dial accents, and twin digital displays, this timepiece delivers an aggressive urban aesthetic alongside JIS Class 1 magnetic resistance, 200-meter water resistance, and a high-precision 1/1000-second chronograph. It serves as a durable, highly functional tool watch designed for sports, outdoor activities, and intensive daily wear.

Brand: Casio

Collection: G-Shock, men's sporty ana-digital watch.

Movement: Battery-powered quartz analog/digital movement featuring Casio Module 5081.

Case: Black resin with shock-resistant construction, measuring approximately 55 × 51.2 × 16.9 mm.

Crystal: Mineral crystal, protected against lateral impacts by the raised bezel structure.

Bracelet / Strap: Flexible, high-durability black resin strap with a traditional pin buckle clasp.

Water resistance: 20 bar (200 m / 660 ft), suitable for swimming, snorkeling, and high-intensity water activities (not recommended for professional saturation diving).

Main functions:

– Analog and digital display of hours, minutes, seconds, date, and day of the week.

– 1/1000-second chronograph with a timing capacity of up to 10 hours and an integrated speed indicator.

– World time function covering 29 time zones across 48 cities, plus Coordinated Universal Time (UTC).

– Countdown timer.

– Five daily alarms (including one snooze alarm) and hourly time signal.

– Full automatic calendar pre-programmed through the year 2099.

– Auto LED backlight with selectable illumination duration and 12/24-hour display formatting.

– JIS Class 1 magnetic resistance and shock-resistant engineering.

Design highlights:

– Dynamic black dial featuring energetic red accents, skeleton-style hands, and two multi-function digital sub-displays.

– Prominent 55 mm black resin case with a multi-piece protective bezel structure designed to guard the mineral crystal.

– Multi-dimensional dial layout offering a technical, instrument-inspired aesthetic.

– Lightweight and durable resin construction optimized for wrist comfort during active wear.

Style: Sporty, technical everyday watch featuring a robust ana-digital design and an aggressive urban look.

Gender: Men's.

Warranty: Product issue support available. If you experience any issue with your watch, please contact us and we’ll review the case and assist you with the next steps.

About the G-Shock Collection:

The Casio G-Shock collection is renowned for its pioneering shock-resistant construction, lightweight resin casing, and exceptional water resistance. Engineered to operate under extreme conditions, G-Shock watches integrate heavy-duty physical protection with advanced timekeeping utility, including high-precision stopwatches, world time functions, and specialized shielding against everyday hazards and mechanical shock.

Within this lineup, the GA-100-1A4 stands out as one of the series' most recognizable extra-large ana-digital models. Its commanding 55 mm case profile, combined with a striking black-and-red colorway, delivers unmistakable wrist presence while maintaining core technical capabilities like JIS Class 1 magnetic resistance and a 1/1000-second stopwatch. It provides the ideal balance of physical durability, practical utility, and bold street-ready style.