This site has explored the appeal of G-SHOCK in many articles over the years.
This page brings together our articles on the G-SHOCK 2100 series.
The popular 5000/5600 series also has an article index here.
What Is the 2100 Series?
Broadly speaking, these are the octagonal G-SHOCK watches shown in this photo.
With its analog display, readability, and simplicity, this is the most popular G-SHOCK series.
Which 2100 Series Model Should You Buy?
Which G-SHOCK would you recommend if I just want a quick answer?—if that is your question, these 4 models are my recommendations.
Where to Buy the Casio GA-2100-1A1
Affiliate links — we may earn a commission.
Where to Buy the Casio GA-2100-1A
Affiliate links — we may earn a commission.
Where to Buy the Casio GM-2110D-2A
Affiliate links — we may earn a commission.
Where to Buy the Casio GM-B2100SD-1A
Affiliate links — we may earn a commission.
Where to Buy the Casio GM-B2100GD-9A
Affiliate links — we may earn a commission.
The 2100 series is popular, so it offers
• All-black models
• Bluetooth-equipped models
• Solar-powered, radio-controlled models
• Full-metal models
—a full range of choices, just like the 5000/5600 series.
Is the 2100 Series Related to the Square G-SHOCK?
Is the 2100 series actually related to the square G-SHOCK?—you may be wondering.
In fact, CASIO has officially said that it drew inspiration from the original G-SHOCK.
As I explained in detail in my earlier GA-2100 article, the popular 2100 series is very much a sibling of the square G-SHOCK—the 5000 and 5600 families.
Take a look at CASIO's page dedicated to the GA-2100 (here).
The 5000 and 2100 series share the same strap design, and the bezel design carries over as well.
An octagonal bezel is what CASIO calls it.
Now that you mention it, it really is an octagon. Maybe I should rename this site from A Site for Square G-SHOCK Fans to A Site for Octagonal G-SHOCK Fans!
Next, the ridged sections around the bezel are another shared detail.
Those ridged sections of the bezel are another feature they share.
In other words, the GA-2100 is a sibling of the square G-SHOCK is what CASIO itself is telling us.
Since CASIO says it based the design on the square G-SHOCK, the GA-2100 counts as a square G-SHOCK in my book.
What Else Should You Know About G-SHOCK?
You may want to understand what G-SHOCK model numbers mean.
Model-number conventions can sometimes differ slightly between older and newer watches, but they generally apply to the 2100 series as well.
Once you understand this much, you are a well-informed G-SHOCK fan!
Articles on Individual Models
Here are our individual model articles, arranged roughly by price.
First, the standard battery-powered model.
Where to Buy the Casio GA-2100-1A
Affiliate links — we may earn a commission.
Where to Buy the Casio GA-2100-1A1
Affiliate links — we may earn a commission.
Where to Buy a Screen Protector for Casio GA-2100
Affiliate links — we may earn a commission.
Here is the model that adds Bluetooth.
Where to Buy the Casio GA-B2100-1A
Affiliate links — we may earn a commission.
Here is the model with a metal bezel only.
Where to Buy the Casio GM-2100-1A
Affiliate links — we may earn a commission.
Here is the model with a metal bracelet.
Where to Buy the Casio GM-2110D-2A
Affiliate links — we may earn a commission.
The dream model combining radio-controlled timekeeping, solar power, and a full-metal design is here.
Where to Buy the Casio GM-B2100SD-1A
Affiliate links — we may earn a commission.
Where to Buy the Casio GM-B2100GD-9A
Affiliate links — we may earn a commission.
Where to Buy the Casio GM-B2100BD-1A
Affiliate links — we may earn a commission.
There is also a slightly more premium model with an entirely analog display.
Where to Buy the Casio GMC-B2100AD-2A
Affiliate links — we may earn a commission.
There is also an exceptionally luxurious MR-G model—impressive if you can get one!
Where to Buy the Casio MRG-B2100B-1AJR
Affiliate links — we may earn a commission.
Enjoy your G-SHOCK life!