CASIO
G-SHOCK GA2100K-1A
G-SHOCK GA2100K-1A
Couldn't load pickup availability
G-SHOCK GA2100K-1A – 2100 Series Analog-Digital Watch
The G-SHOCK GA2100K-1A is a modern analog-digital timepiece from the iconic 2100 Series, blending a sleek, streamlined design with legendary G-SHOCK shock resistance. Inspired by mysterious nightlife and laser-lit music scenes, this model delivers a bold visual presence while maintaining everyday durability and functionality.
Design Overview
The GA2100K-1A features a newly developed surface finish on the dial, creating a clean and refined look that enhances the signature octagonal case design. Accents inspired by neon light and smoky nighttime atmospheres give the watch depth and texture, while translucent elements and matte finishes recall the haze of late-night music venues. This design-forward aesthetic is paired with lightweight construction for comfortable daily wear.
Key Features
- Analog-Digital display
- Shock Resistant construction
- Carbon Core Guard Structure
- 200-meter water resistance
- World Time (31 time zones, 48 cities + UTC)
- 1/100-second stopwatch
- Countdown timer (up to 24 hours)
- 5 daily alarms and hourly time signal
- Double LED light (Super Illuminator)
- Hand shift feature for unobstructed digital view
Case & Exterior
- Case / Bezel Material: Carbon / Resin
- Glass: Mineral Glass
- Band: Resin Band
- Compatible Wrist Size: 145 – 215 mm
- Weight: 51 g
Case Dimensions
- Case Size (L × W × H): 48.5 × 45.4 × 11.8 mm
Movement & Accuracy
- Movement Type: Quartz
- Accuracy: ±15 seconds per month
- Battery Life: Approx. 3 years (SR726W × 2)
Functions
- World Time: 31 time zones, daylight saving on/off
- Stopwatch: 1/100 second (up to 60 minutes), 1 second thereafter
- Timer: Countdown timer, 1-second increments
- Alarm: 5 daily alarms
- Calendar: Full auto-calendar (to year 2099)
- Light: Double LED light (white)
- Mute Feature: Button operation tone on/off
- Time Format: 12/24-hour format
Water Resistance
- Water Resistance: 200 meters
Summary
The G-SHOCK GA2100K-1A combines cutting-edge design with trusted toughness in a lightweight and versatile package. Featuring a refined octagonal case, Carbon Core Guard structure, and essential world-time functionality, this model is ideal for those seeking a durable everyday sports watch with a bold, modern aesthetic inspired by music and nightlife culture.
For more details, visit the official CASIO website here.
Warranty
All our G-SHOCK watches include the official manufacturer’s warranty for peace of mind and long-term protection.
▶︎ Processing Time & Shipping Policy
▶︎ Refund Policy
We only carry G-SHOCK USA products.
Unfortunately, we DO NOT ship internationally.
Share

CASIO G-SHOCK COLLECTION
-
G-SHOCK 5000 Series
The CASIO G-SHOCK 5000 series, a true legend since 1983, embodies the...
-
G-SHOCK FULL MEATAL Series
The CASIO G-SHOCK FULL METAL series is the ultimate fusion of toughness...
-
G-SHOCK G-STEEL Series
The CASIO G-SHOCK G-STEEL series blends rugged strength with refined elegance, featuring...
-
G-SHOCK 2100 (CasiOak) Series
The CASIO G-SHOCK 2100 series, known as the “CasiOak” for its sleek...
-
G-SHOCK 5600 Series
The CASIO G-SHOCK 5600 series stays true to its roots with the...
-
G-SHOCK GA-100 Series
The CASIO G-SHOCK GA-100 series stands out with its bold, oversized case...
-
G-SHOCK 6900 Series
The CASIO G-SHOCK 6900 series, an icon of toughness since 1995, delivers...
-
CASIO BABY-G Series
The CASIO BABY-G series combines tough durability with a compact, stylish design....
-
G-SHOCK 700 Series
The CASIO G-SHOCK 700 Series combines bold design with everyday functionality. Featuring...
-
G-SHOCK 900 Series
The CASIO G-SHOCK 900 Series delivers bold design and ultimate durability. With...
-
CASIO CLASSIC Series
The Casio Classic Series, a timeless icon since the 1970s, blends vintage...
-
G-SHOCK MOVE
The CASIO G-SHOCK MOVE series combines toughness with advanced fitness tracking. With...
Explore Your Favorite G-SHOCK Watches
Explore our current selection of G-SHOCK watches. If you don’t see your preferred model, check the G-SHOCK USA website, note the model number, and contact us via email or phone(415-567-2400) to place your order. Ask about our special deals!
Please note:
- We only carry G-SHOCK USA products.
- Unfortunately, we DO NOT ship internationally.
Trusted Since 1967
Our owner, Asuka Saito, is certified by both Gemological Institute of America (GIA) and Cultured Pearl Association of America (CPAA), and we also have a GIA-certified appraiser on staff. Asuka is also a color specialist, certified as a TC Color Therapist and Sensational Color.