Casio G-Shock Octagon Series ‘CasiOak’ Quartz Digital Black Resin Strap Men's Watch GA-2100-1A2ER
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Casio G-Shock Octagon Series ‘CasiOak’ Quartz Grey Dial Grey Silicone Strap Men's Watch GA-2100-1A2ER
The Casio G-Shock GA-2100-1A2ER, also known as the "CasiOak," is a striking fusion of G-Shock's signature durability and a sleek, modern design. Drawing inspiration from classic G-Shock aesthetics but with a refined twist, the GA-2100-1A2ER features an octagonal bezel that is both bold and stylish. Ideal for adventurers, watch enthusiasts, or anyone in search of a rugged timepiece that doesn't compromise on style, this watch is built to endure while keeping you on time.
Design & Features
Dial & Display
Dial Color: Grey with Blue Accents – A modern and understated design, perfect for both casual and sport settings.
Display Type: Analog-Digital Hybrid – A versatile display combining traditional analog hands with a digital readout for multifunctional convenience.
Case & Build
Case Diameter: 49mm – A bold, masculine size while still being comfortable for most wrist sizes.
Case Thickness: 12mm – A slim profile for a G-Shock, maintaining comfort without sacrificing durability.
Strap & Comfort
Strap Material: Resin – Soft, flexible, and water-resistant, offering all-day comfort for active wear.
Clasp: Buckle Closure – Secure, adjustable fit for maximum comfort and wearability.
Lightweight Build: Despite its robust construction, the GA-2100-1A2ER is light on the wrist, making it suitable for everyday wear and sports activities.
Movement & Performance
Movement: Quartz (Module 5611) – Offers precise timekeeping with minimal maintenance.
Water Resistance: 200 meters (20 ATM) – Suitable for swimming, snorkeling, and professional marine activity.
Specifications
Brand: Casio G-Shock
Series: Octagon / CasiOak
Model: GA-2100-1A2ER
Movement: Quartz (Module 5611)
Case Material: Carbon-Resin
Case Dimensions: 49mm
- Case Thickness: 12mm
Dial Color: Grey
Crystal: Mineral Glass
Strap Material: Resin
Water Resistance: 200m (20 ATM)
Key Features
World Time & Stopwatch – Perfect for globetrotters and those needing precision in tracking time.
200m Water Resistance – Ready for swimming, snorkeling, and marine activities.
Who Is It For?
Style-Conscious Watch Enthusiasts – Ideal for those who want a bold, fashionable timepiece.
G-Shock Fans & Collectors – A must-have addition to any G-Shock collection, blending modern design with classic toughness.
Outdoor Adventurers – Durable and equipped with features ideal for harsh conditions.
Active Sports & Fitness Lovers – Lightweight, shock-resistant, and water-resistant, perfect for an active lifestyle.
Everyday Wearers – A versatile timepiece for those who need a reliable watch that pairs with any outfit.
Final Thoughts
The Casio G-Shock GA-2100-1A2ER "CasiOak" is a standout in the G-Shock lineup, offering a blend of timeless durability, modern aesthetics, and advanced features. Whether you’re looking for a watch that can handle the outdoors or simply need a statement piece that performs as well as it looks, the GA-2100-1A2ER offers everything you need, and more. With its shock resistance, water resistance, and sleek design, this watch is the perfect companion for both adventure and everyday wear.
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UK Delivery
| Selling Price | Royal Mail 48 (Tracked) |
Royal Mail 24 (Tracked & Signed) |
Special Delivery Next Day (Mon – Fri) |
Special Sunday Delivery (Before Sat 12pm) |
Royal Mail Special Delivery by 1pm |
|---|---|---|---|---|---|
| £0 to £99.99 | FREE | £4.99 | £7.99 | £7.99 | £9.99 |
| £100 to £499.99 | N/A | FREE | £7.99 | £7.99 | £9.99 |
| £500 or more | N/A | N/A | FREE | £7.99 | £9.99 |
We know your order is important to you, so we use Royal Mail’s tracked delivery service on all UK orders.
We also offer Royal Mail Special Delivery service, which for an additional fee offers guaranteed delivery the next day before 1pm.
*Royal Mail Tracked 24 and Royal Mail Tracked 48 services are 98% accurate but not guaranteed.
Orders placed before 5pm (Monday–Friday) are dispatched the same day. Orders placed on Saturday or Sunday are dispatched the following Monday.
International Delivery
We are pleased to offer worldwide shipping. For accurate shipping rates, please add the item to your basket. Once you enter your shipping address, you will be offered all available options.
For the EU, EEA, and the rest of the world, the total price shown at checkout includes only the outbound Royal Mail / DHL shipping cost. You will be contacted by Royal Mail / DHL regarding duties and taxes. If you refuse the parcel and do not pay the required customs or duties, the outbound shipping cost will be deducted from your refund.
On average, delivery to the EU takes 3–5 working days, and delivery to the rest of the world takes 5–7 working days.
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Frequently Asked Questions
Yes — we are an Authorised Dealer for every brand we sell. All watches come with an official box, papers, and a full manufacturer’s warranty.
Every watch includes a manufacturer warranty. You’ll find more warranty info listed in the product description.
Orders placed before 5pm (Mon–Fri) are dispatched the same day. Order before 12pm on Sat for same-day dispatch. Free UK delivery is available on all orders, and tracking details are provided once shipped.
Yes — you have 30 days from delivery to return or exchange your item, provided it’s unused and in its original packaging.