A G-Shock Mod Watch starts as an authentic, brand-new Casio G-Shock and is hand-rebuilt with premium high quality parts — including full stainless steel cases, brushed metal straps, and custom dials. The result is a luxury-looking timepiece that retains all the toughness of the original G-Shock.

Yes, 100%. Every G-TUNE Mod starts with a genuine, brand-new Casio G-Shock purchased directly from official sources. We never use counterfeit or grey-market watches. Your mod comes with the original box and parts, papers, and warranty card.

No. G-TUNE is an independent workshop specializing in Luxury G-Shock customizations. We are not affiliated with Casio or the G-Shock brand. All customizations are performed by us after purchasing authentic Casio watches.

Yes, our G-Shock Mods keep the water resistance after modification. G-Shocks are world-renowned for their toughness, and our professional modification team reseals every watch with precision tools and premium gaskets, preserving the integrity of the case. You can wear our watches with the same confidence as a stock G-Shock — no risk, no compromise.

We primarily work with the GA-2100 and GM-2100 (CasiOak) series, which is the most popular base for premium mods due to its iconic octagonal case shape. We also work with select other models. Check our Mod Watches collection for all available options, or use the Watch Configurator to build your own.

Our Watch Configurator lets you choose your preferred dial model, strap case, and case style to build a completely unique watch. Once you submit your custom order, our team hand-builds it to your exact spec and ships it to you.

Custom-configured watches typically take 4–8 business days to build before shipping, as each one is assembled by hand. You'll receive updates throughout the build process, and once your watch is finished, we'll send you a tracking number so you can follow your order. Shipping usually takes 5 business days or less.

Yes! We sell premium bands and bracelets separately in our Bands for Mods collection. Available in Full Steel, Rubber & Steel, and specialty fits for different G-Shock models. Make sure to check compatibility with your model before ordering.

Yes. All G-TUNE Mod Watches retain the original Casio G-Shock international warranty and our store warranty (3 years). Your package includes the original warranty card and documentation. To activate the warranty, you can send us the watch and we'll handle it — you'll just need to include the original band, watch, and box. For more info: world.casio.com/support/warranty.

Every G-TUNE Mod Watch order includes:

• The G-Shock Mod Watch (assembled with premium parts)
• Original G-Shock band (your choice)
• Original G-Shock box & warranty documentation
• G-TUNE stickers and disassembly tools