SPECIFICATIONS
MovementJapan Analog/Digital quartz (Module 5081); accuracy ±15 seconds per month
CaliberModule 5081
Case size55 × 51.2 × 16.9 mmmm
Case materialResin
Case shapeRectangular with three-dial face design (analog center, digital sides)
Thickness16.9 mmmm
CrystalMineral Glass
Dial colorVaries by model (e.g., black/red for GA100-1A4, full black for GA-100-1A1ER)
ComplicationsWorld Time (29 zones), 1/1000-second stopwatch (with speed, distance, Mach indicator), countdown timer (24 hours, auto-repeat), 5 daily alarms (1 snooze), hourly time signal, full auto-calendar to 2099, 12/24-hour format, analog speed dial
Release year2010
Casio
G-Shock GA-100
The Casio G-Shock GA-100 is an analog-digital combination watch from the GA-100 series, launched in 2010, known for its large resin case, shock resistance, and magnetic resistance. It features an oversized design with easy-to-use anti-slip buttons.