This series downsizes the GA-2100 to create a simple and slim design.
The octagonal bezel, flat face, simple bar hour markers, and carbon core guard structure that are distinctive features of the GA-2100 are now available in a compact configuration.

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The GMA-S2100-1 watch is a sleek and stylish accessory from Casio’s G-Shock collection. With its modern design and impressive features, this timepiece offers the perfect blend of fashion and functionality.

Crafted with high-quality materials and featuring a shock-resistant construction, the GMA-S2100-1 watch is built to withstand the demands of an active lifestyle. It is water-resistant up to 200 meters, making it suitable for water-related activities and everyday wear.

This watch is equipped with practical features that enhance its functionality. It includes a digital display that provides clear and easy-to-read information, showcasing the time, date, and selected functions. The stopwatch feature allows for precise timing, while the countdown timer helps you manage your activities efficiently. The daily alarm ensures you stay on schedule and never miss an important event.



  • Case / bezel material: Carbon / Resin 
  • Resin Band
  • Mineral Glass
  • Neobrite
  • Shock Resistant
  • Carbon Core Guard structure
  • 200-meter water resistance
  • Double LED light
    LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
    LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
  • World time
    31 time zones (48 cities + coordinated universal time), daylight saving on/off
  • 1/100-second stopwatch
    Measuring capacity:
    00’00”00~59’59”99 (for the first 60 minutes)
    1:00’00”~23:59’59” (after 60 minutes)
    Measuring unit:
    1/100 second (for the first 60 minutes)
    1 second (after 60 minutes)
    Measuring modes: Elapsed time, split time, 1st-2nd place times
  • Countdown timer
    Measuring unit: 1 second
    Countdown range: 24 hours
    Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)
  • 5 daily alarms
  • Hourly time signal
  • Hand shift feature
  • Full auto-calendar (to year 2099)
  • 12/24-hour format
  • Button operation tone on/off
  • Regular timekeeping
    Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day)
    Digital: Hour, minute, second, pm, month, date
  • Accuracy: ±15 seconds per month
  • Approx. battery life: 3 years on SR726W × 2



46.2 x 42.9 x 11.2mm


Casio, G-Shock




Black, Rose gold



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