Is your G-Shock
the real deal?
G-Shock is one of the most counterfeited watch lines in the world. Fakes of the DW-5600, GA-2100 "CasiOak", and GA-110 flood online marketplaces.
How to authenticate a G-Shock
Module Number on Case Back
The 4-digit module number (e.g., 3229, 5611) is printed on the case back. It should match the official Casio spec sheet for that model. You can verify it on Casio's website by searching the module number.
Backlight Test
Genuine G-Shocks have bright, even EL or LED backlighting that illuminates the entire display clearly. Fakes are dim, uneven, or have a noticeably different color tone compared to the genuine article.
Resin Band Quality
Genuine G-Shock bands have a smooth matte texture with precise molding and clean edges. Fakes feel waxy or rubbery, have visible seams, rough edges, or an inconsistent texture along the strap.
Button Feel and Response
Buttons on a genuine G-Shock should be firm with a distinct click and positive feedback. Mushy, sticky, or overly loose buttons are a red flag. Each button should activate its function reliably every time.
Water Resistance
Genuine G-Shocks are rated to 200m water resistance. The case back should show "20 BAR" or "WR 200M". Fakes may omit this marking, display an incorrect rating, or fail to provide any meaningful water protection.
Weight and Build
Genuine G-Shocks feel solid and well-constructed. The case should have no rattling parts or loose bezels. The resin case and bezel should fit together seamlessly with no gaps or misalignment between components.
G-Shock counterfeit warning signs
Dim or Non-Functional Backlight
A genuine G-Shock backlight is bright and evenly distributed across the display. If the backlight is dim, flickers, only partially illuminates, or does not work at all, the watch is very likely counterfeit.
Text on Dial Is Blurry, Wrong Font, or Misaligned
Genuine G-Shocks have crisp, precisely printed text on the dial and bezel. Check the "G-SHOCK" branding, model name, and any sub-text. Blurry printing, incorrect fonts, or text that is off-center or crooked indicates a counterfeit.
Resin Bezel Feels Cheap or Has Visible Mold Marks
The resin bezel on a genuine G-Shock is thick, durable, and cleanly molded. If the bezel feels thin, flimsy, or has visible injection mold marks, flash lines, or rough edges, it is a sign of a counterfeit.
Functions Don't Work Properly
All G-Shock functions should work as specified: alarm, stopwatch, countdown timer, and world time. If any function is missing, unresponsive, or behaves erratically, the watch is almost certainly a fake. Test every mode before buying.
Scan your G-Shock now
Upload a few photos and get an AI-powered authenticity report in seconds. First scan free.
Start ScanningFor high-value purchases, we recommend pairing your AI scan with an in-person inspection by a certified watchmaker for complete peace of mind.
Frequently asked questions
What is the module number?
The module number is the 4-digit number on the case back that identifies the movement. You can look it up on Casio's website to verify it matches the model you have.
Which G-Shocks are most faked?
The DW-5600 (classic square), GA-2100 "CasiOak", and GA-110 are the most counterfeited due to their popularity and iconic designs.
Are metal G-Shocks (GM-B2100) also faked?
Yes, the full-metal and metal-clad G-Shocks are increasingly counterfeited. Check the weight (genuine metal is heavy), module number, and Bluetooth connectivity.