Model choices

Colours and versions

Some versions are older and may be hard to find. Check the exact model and current stock before ordering.

THE ANALOG-DIGITAL G-SHOCK

G-ShockOwned and Reviewed

G-Shock GA-2100 Casioak

A slim, tough G‑Shock that feels well made and sits comfortably on the wrist. The hands are clear, and the small weekday dial is handy. I loved my Hidden Glow dial at night. Compared with the SKMEI 2091, the Casio offers better build quality, a thinner case and hands that move both ways when setting the time.

Best for:People who want a slim, genuine G‑Shock with an analogue dial and useful digital functions

Not ideal if:You use the small digital screen a lot or want easy‑to‑press buttons. My Hidden Glow edition has a dark screen that is hard to read. Look for a GA‑2100 with dark digits on a light screen instead.

Shop Now Watch Review

Shop GA-2100 colours and check the model before buying. My review is of the Hidden Glow edition. Stock varies by country.

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Case size48.5 × 45.4 × 11.8 mm

Weight51 g

Water Resistance200 m

Rating Guide

Battery2 × SR726W(Approx. 3 Years)

The practical verdict

What matters before you buy

Review details

This guide combines my hands-on verdict with the specifications and buying details above.

4.0 / 5 My WatchCrunch Review score

Specifications checked against the manufacturer.

WatchCrunch Review

From the GOAT Reviews community

Community Thoughts

Short comments from viewers who joined the discussion around this watch.

“I have a love hate relationship with this watch. I like the size and comfort, but I absolutely hate the useless small digital display.”
YouTube Viewer@MrSonofagun45

Review evidence

My Hidden Glow edition

I tested the grey GA-2100HD-8A Hidden Glow for a week. This is the edition my review and specs cover. The other colours shown here are GA-2100 models, but I have not tested each one.

Watch the video

Compare the details

G‑Shock GA‑2100 Casioak or SKMEI 2091?

Compare the thinner, genuine G-Shock with the much cheaper SKMEI: its soft straps and larger buttons have advantages, but the construction, water rating and hand-setting behaviour differ.

Compare With the SKMEI 2091

Choose your Casioak

Which GA-2100 would I choose?

I loved the glowing dial on my grey Hidden Glow edition. Its small dark screen was much harder to read. If you use the timer or alarms often, look for dark digits on a light screen.

There are plenty of GA-2100 colours to choose from. Not all have the Hidden Glow dial. The colours shown here are GA-2100 models only, not the solar GA-B2100 or metal GM-2100.

Shop Available GA-2100 Options