We earn a commission if you buy through links on this page, at no extra cost to you. How we earn.

Casio G-Shock GA-2100-1AERCasio G-Shock GA-2100-1AER

Everything else · Casio

Casio G-Shock GA-2100-1AER

Research-based buying advice · How we research · Explore reviews

Check the live price on Amazon and eBay. Ranked #1 of the best men's watches.

New, Amazon UK£75Checked yesterday, 22:35 Details

Product prices and availability are accurate as of the date/time indicated and are subject to change. We earn a small commission if you buy through these links, at no cost to you.

Why it's here

Best for most people

This octagon G-Shock is the easy everyday watch, with a quartz movement, 200m water resistance and both analogue hands and a digital display. It is tough enough for the gym, the beach and DIY. The black plastic case looks casual, so it is not the one for a suit. See it against the rest of the best men's watches →

case
49mm
water
200m
display
Analogue and digital
movement
Quartz

Use the research for your decision

Start with the job you need done, then read the recorded benefits and drawbacks against it. Confirm the exact model’s specifications and compatibility before buying.

This page summarises catalogue research. GVT has not independently tested this product. How to read our recommendations.

Explore buying ideas · Compare alternatives

Before choosing everything else

These are buying checks for the category, rather than verified features of this particular model.

Your reason to buy
Name the everyday job you want this purchase to solve.
What to match
Match the exact model and included parts to that job.
Before you pay
Confirm dimensions, compatibility, total cost and returns before paying.
Find a buying guide for your next step →

More from the best men's watches

See the full ranking →

Still unsure what fits?

Get a personal buying plan around your budget and the gear you already own. Up to three alternatives, documented fit checks and clear reasons to choose or skip.

Check my setup before I buy →£19 one-off · products bought separatelyRead an example first