Casio GA-2100-1A

Redefine ultimate toughness with the modern cult classic Casio G-Shock GA-2100-1A (affectionately dubbed the "CasiOak" by watch enthusiasts worldwide). Inheriting the iconic octagonal bezel design concept of the original 1983 DW-5000C, this analog-digital model eliminates all unnecessary bulk while maintaining G-Shock's core shock-resistant DNA.

The defining characteristic of the GA-2100 series is its revolutionary Carbon Core Guard structure. By integrating high-rigidity resin reinforced with carbon fiber into the inner case, Casio achieved a remarkably thin profile of just 11.8 mm—making it one of the slimmest analog-digital G-Shock models ever created without sacrificing impact durability or 200-meter water resistance.

Key Features

• Carbon Core Guard Construction: Utilizes a carbon-fiber-reinforced resin core to protect the internal module against shocks, drops, and extreme vibrations while keeping the overall watch featherlight at just 51 g.
• Iconic Octagonal Bezel: Honors the heritage of the original DW-5000C with a modern, streamlined 8-sided geometric bezel that seamlessly transitions between rugged outdoors and casual everyday wear.
• Ultra-Slim 11.8 mm Profile: Glides effortlessly under shirt cuffs and jacket sleeves, solving the common issue of overly bulky tactical timepieces.
• Analog-Digital Dual Layout: Features crisp analog hands for quick time-reading alongside a high-contrast LCD screen for precise tracking of date, world time, stopwatch, and alarm functions.
• Hand Shift Feature: With the push of a button, the analog hands temporarily move out of the way to provide an unobstructed view of the digital display.
• Double Super Illuminator LED: Equipped with high-brightness white LEDs for both the analog dial face and the digital LCD panel, ensuring effortless readability in pitch-black conditions.
• 200-Meter Water Resistance: Backed by a solid 20-bar depth rating, making it completely resilient during heavy rain, swimming, snorkeling, or high-impact water sports.

Specifications at a Glance

• Case Size: 48.5 x 45.4 x 11.8 mm
• Weight: 51 g
• Case and Bezel Material: Carbon / Resin
• Band Material: High-Durability Resin (Fits 145 to 215 mm wrists)
• Glass: Scratch-Resistant Mineral Glass
• Water Resistance: 200 Meters (20 Bar)
• Battery Life: Approx. 3 years on 2 x SR726W cells
• Precision Accuracy: +/-15 seconds per month