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The Casio G-Shock GA-2100-1A1 is the all-black analog-digital model often called the CasiOak for its octagonal bezel. It pairs a carbon-core guard case with a resin strap, 200 m water resistance, shock resistance and a Super Illuminator LED backlight. It suits people who want a slim, tough everyday watch that reads cleanly in analog or digital form. Against bulkier G-Shocks it is noticeably thinner and lighter, though the all-black dial and hands are harder to read at a glance than the higher-contrast versions.
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Owners like the GA-2100 for its slim case, light weight and tough build, and many call it the most wearable G-Shock. The most common complaint is legibility: the black-on-black dial and hands are hard to read in low light.
The Casio G-Shock GA-2100-1A1 is an analog-digital watch in black. It has an impact-resistant structure and a resin strap.
It is waterproof to 200 meters. An LED backlight (Super Illuminator) lights the display.
