G-Shock GA-2100-1A1
GA-2100 Black
2019 –present Retail $99
What Should You Pay?
Estimated fair market values. Actual prices vary by condition, completeness, and seller.
New / Like New / Full Kit
$63 – $82
high confidence
Excellent / Pre-Owned
$56 – $68
high confidence
Used / Watch Only
$40 – $52
high confidence
Fair Market Value
$60
Blended estimate for excellent condition
Recent Comparable Listings
The GA-2100-1A1 is the all-black variant of G-Shock's slimmest analog-digital model. It features a carbon-reinforced resin case with an octagonal bezel design inspired by the original G-Shock DW-5000C. The watch combines analog and digital displays with G-Shock's signature durability in a more compact and wear-friendly package.
Specifications
Case Diameter 45.4 mm
Case Height 11.8 mm
Case Material carbon core guard composite, resin
Case Shape octagonal
Case Back screw_down
Water Resistance 200m
Crystal mineral
Bezel Type fixed
Bezel Material resin
Dial Color black
Dial Indexes mixed
Dial Hands stick
Bracelet/Strap integrated
Bracelet Material resin
Clasp pin_buckle
Complications date, day
Movement
Movement Module 5611
Type quartz
Functions hours, minutes, seconds, date, day, world_time, stopwatch, timer, alarm
More from 2100 Series
View all 2100 Series references →
Related Guides & Articles
Buyer's Guide
Best Watches Under $1,000 in 2026
The best watches you can buy under $1,000 in 2026 — pre-owned and new picks from Seiko, Hamilton, Orient, Tissot, and G-Shock with current prices.
Mar 7, 2026
Buyer's GuidePre-Owned Casio & G-Shock: Buying Guide
Guide to buying secondhand Casio and G-Shock watches — from vintage digitals to limited-edition G-Shocks, with current prices and collecting tips.
Mar 4, 2026