Skip to product information
"Nautilus" Style Luxury Modification Kit for Casio G-Shock GA-2100 & GA-2110

"Nautilus" Style Luxury Modification Kit for Casio G-Shock GA-2100 & GA-2110

Sale price  $167.95 Regular price  $193.95
Shipping calculated at checkout.
Band Color
Band Width

"Nautilus" Style Luxury Modification Kit for Casio G-Shock GA-2100 & GA-2110

The Ultimate "CasiOak" Evolution: Iconic Luxury Design Meets G-Shock Toughness

Take your GA-2100 or GA-2110 to the pinnacle of luxury with the Geekthink Nautilus-Style Modification Kit. This premium "Refit" set transforms your standard resin G-Shock into a sophisticated, high-end timepiece inspired by the world’s most iconic integrated-bracelet designs.

Whether you choose the 3rd, 4th, or 5th Generation kit, you are getting a precision-engineered 316L Stainless Steel bezel and your choice of a matching solid steel bracelet or a high-performance integrated rubber strap. This is the perfect DIY upgrade for enthusiasts who want the "CasiOak" aesthetic with a refined, gentlemanly edge.


Why Choose the Geekthink "Nautilus" Mod Kit?

  • Iconic "Nautilus" Aesthetic: Features the distinct rounded-octagon bezel and integrated lug design that creates a seamless, luxury profile on the wrist.

  • Multi-Generation Options: Available in Gen 3, Gen 4, and Gen 5 versions, offering refinements in thickness, weight, and installation ease to suit your preference.

  • Premium Material Choice: Crafted from marine-grade 316L Stainless Steel with expertly brushed and polished finishes. Choose the full steel bracelet for a classic look or the rubber band for a sporty, modern feel.

  • Precision Drop-In Fit: Specifically molded for the GA-2100/2110 module. The module fits securely into the steel case with no movement, maintaining the G-Shock's core shock resistance.

  • Enhanced Security: Equipped with high-quality Folding Buckles (for steel bands) or Pin Buckles (for rubber bands) to ensure your watch stays safely on your wrist.1


Compatibility & Model Guide

This modification kit is designed as a direct "refit" for the following Casio series:

Series Popular Compatible Models
G-Shock GA-2100 GA-2100-1A, GA-2100-1A1 (Stealth), GA-2100-4A, GA-2100-7A
G-Shock GA-2110 GA-2110ET, GA-2110SU, GA-2110VB
Note Fits most standard 2100/2110 modules. Please check your module version for Gen 5 compatibility.

Product Specifications

  • Model Number: CS0172 / GA2100 Series

  • Case Material: 316L Stainless Steel

  • Band Options: Solid Stainless Steel or Premium Rubber

  • Band Length: 21cm (Fully adjustable)

  • Clasp Type: Butterfly Folding Buckle or Heavy-Duty Pin Buckle

  • Versions Available: Gen 3 / Gen 4 / Gen 5 Optional

Ready to refit your G-Shock? Select your generation and finish today to create your own custom Luxury CasiOak!

Made with care

Great value

Elegant design

Quality materials

Details

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

Shipping & Returns

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.

Shop The Full Collection

26mm, 20mm & 22mm Silicone Watchband for Garmin Fenix 6, 6X Pro, 5, 5S, 5X Plus, 3HR – Quick Release Strap

26mm, 20mm & 22mm Silicone Watchband for Garmin Fenix 6, 6X Pro, 5, 5S, 5X Plus, 3HR – Quick Release Strap

Regular price  $37.95 Sale price  $32.95
Silicone Watch Band for Garmin Venu, Vivoactive & Forerunner (18mm, 20mm, 22mm)

Silicone Watch Band for Garmin Venu, Vivoactive & Forerunner (18mm, 20mm, 22mm)

Regular price  $33.95 Sale price  $29.95
QuickFit 22mm & 26mm Nylon Strap for Garmin Fenix, Forerunner, Instinct – Braided Band

QuickFit 22mm & 26mm Nylon Strap for Garmin Fenix, Forerunner, Instinct – Braided Band

Regular price  $57.95 Sale price  $49.95
8mm Women’s Genuine Leather Watch Strap Bracelet Soft Cowhide Band for Fossil ES3060, ES3565, ES2830

8mm Women’s Genuine Leather Watch Strap Bracelet Soft Cowhide Band for Fossil ES3060, ES3565, ES2830

Regular price  $66.95 Sale price  $57.95
Alpine Loop Strap for Apple Watch Ultra 2/10/9/SE/8/7/6/5/4/3/2/1 - 38-49mm - Nylon Band

Alpine Loop Strap for Apple Watch Ultra 2/10/9/SE/8/7/6/5/4/3/2/1 - 38-49mm - Nylon Band

Regular price  $39.95 Sale price  $34.95
18mm & 20mm Silicone Strap for Garmin Venu Sq 2 Plus, Vivoactive 4S, Venu 3S, 2S – Wristband

18mm & 20mm Silicone Strap for Garmin Venu Sq 2 Plus, Vivoactive 4S, Venu 3S, 2S – Wristband

Regular price  $46.95 Sale price  $39.95
Nylon Rubber strap for Omega Seamaster Planet Ocean – Deployant/Deployment Clasp 20mm, 21mm, 22mm

Nylon Rubber strap for Omega Seamaster Planet Ocean – Deployant/Deployment Clasp 20mm, 21mm, 22mm

Regular price  $139.95 Sale price  $119.95
QuickFit Silicone Strap for Garmin Fenix, Forerunner, Tactix, Quatix, Enduro, D2 (20mm, 22mm, 26mm)

QuickFit Silicone Strap for Garmin Fenix, Forerunner, Tactix, Quatix, Enduro, D2 (20mm, 22mm, 26mm)

Regular price  $39.95 Sale price  $33.95
Soft Silicone Strap for Samsung Galaxy Watch 6/5/4 Series (20mm)

Soft Silicone Strap for Samsung Galaxy Watch 6/5/4 Series (20mm)

Regular price  $33.95 Sale price  $29.95
20/22mm Leather Strap for Samsung Galaxy Watch/Redmi Watch - Vintage Bracelet

20/22mm Leather Strap for Samsung Galaxy Watch/Redmi Watch - Vintage Bracelet

Regular price  $21.95 Sale price  $18.95
18mm/20mm/22mm/24mm Nylon Woven Canvas Watchband Strap – Universal for SEIKO, IWC, Citizen, Rolex

18mm/20mm/22mm/24mm Nylon Woven Canvas Watchband Strap – Universal for SEIKO, IWC, Citizen, Rolex

Regular price  $33.95 Sale price  $29.95
Sports Silicone Strap for Garmin Forerunner 965, 955 Solar, 945, 935, 745 – 22mm Replacement Band

Sports Silicone Strap for Garmin Forerunner 965, 955 Solar, 945, 935, 745 – 22mm Replacement Band

Regular price  $38.95 Sale price  $33.95
Silicone Watch Strap - 12-22mm - Casio W800H, F91W, AE1200 & More - Resin Bracelet

Silicone Watch Strap - 12-22mm - Casio W800H, F91W, AE1200 & More - Resin Bracelet

Regular price  $33.95 Sale price  $28.95
16mm Silicone Strap for Casio G-SHOCK GA-100/110/200 GD-100 GW-8900, TPU Band

16mm Silicone Strap for Casio G-SHOCK GA-100/110/200 GD-100 GW-8900, TPU Band

Regular price  $50.95 Sale price  $43.95
Adjustable Elastic Nylon Strap for Fitbit Versa 3/4, Sense & Sense 2 – Comfortable & Breathable

Adjustable Elastic Nylon Strap for Fitbit Versa 3/4, Sense & Sense 2 – Comfortable & Breathable

Regular price  $28.95 Sale price  $24.95
Silicone Sport Watch Band for Fitbit Versa & Sense Series – Comfortable & Durable Strap

Silicone Sport Watch Band for Fitbit Versa & Sense Series – Comfortable & Durable Strap

Regular price  $29.95 Sale price  $25.95