Casio G-Shock Octagon Series ‘CasiOak’ Quartz Silver Dial Black Silicone Strap Men’s Watch GA-2100SB-1AER
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Casio G-Shock Octagon Series ‘CasiOak’ Quartz Silver Dial Black Silicone Strap Men’s Watch GA-2100SB-1AER
The Case:
The Casio G-Shock Octagon Series ‘CasiOak’ GA-2100SB-1AER features Casio’s slimmest ever case measuring just 11.8mm in depth. The case is made from resin and it is presented in a black hue. The case measures 45.4mm in width and it takes its ‘CasiOak’ nickname from its octagonal shape, which bears a resemblance to the Audemars Piguet ‘Royal Oak’.
The case exhibits a fixed bezel which displays the ‘G-Shock’ logo in a white tone. At the side of the case there are four push buttons that are located at 2, 4, 8 and 10 o’clock. Scratch resistant mineral glass provides this timepiece with protection against shattering. The case is also designed using Casio’s new carbon core guard structure, which ensures superior shock resistance by leveraging the properties of carbon fiber (shock resistance, rigidity, and resistance to degradation), which is also used for aircraft parts.
The Dial:
The silver dial exhibits an uncomplicated digi-analog display, which ensures the watch remains both easily readable and aesthetically pleasing. Raised baton style hour markers are located around the edge of the dial, whilst a 60-minute scale is located in between the hour markers on the chapter ring. A day-display is located beside the 9 o’clock marker, whilst the digital display window is positioned between the 3 and 6 o’clock markers. A pencil style handset extends out from the centre of the dial, it has been filled with a luminescent material to ensure that the dial remains readable in the dark.
The Strap:
The black strap is made from resin and it has a perforated design, which permits greater comfort on the wrist as it allows it to breathe. The strap fastens with a standard buckle.
The Functions:
This timepiece is powered by a Japanese made quartz mechanism, which provides this watch with optimum levels of reliability and an accuracy of +/- 15 seconds per month. It also features a world time function and a stopwatch. It is water resistant to 200 metres, which means it can be worn when diving.
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Delivery Information
UK Shipping
We are pleased to offer FREE shipping on all UK orders. All items sent to UK customers are fully insured for added peace of mind.
The table below provides a breakdown of our shipping rates based on the selling price of your order, including VAT and any discounts.
| Selling Price | Royal Mail 48 Tracked |
Royal Mail 24 Tracked & Signed |
Special Delivery Next Day Orders placed Mon–Fri |
Special Sunday Delivery Orders placed before Saturday 12pm |
Royal Mail Special Delivery By 1pm |
|---|---|---|---|---|---|
| £0 to £99.99 | FREE | £4.99 | £7.99 | £7.99 | £9.99 |
| £100 to £499 | 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, 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.
UK orders placed before 4pm Monday–Friday are dispatched the same day. Orders placed on Saturday or Sunday are dispatched on the following working day.
We are not open during UK bank holidays. Orders received on bank holidays will be dispatched promptly the next working day.
International Shipping & Duties
We’re pleased to offer worldwide delivery with fully tracked and insured shipping.
To make international delivery clearer, our shipping terms vary depending on the delivery country. Some destinations are shipped with duties and taxes included, while others may require local import charges to be paid before delivery.
DDP Destinations
For orders delivered to the USA, Canada and the European Union countries listed below, we ship on a DDP (Delivered Duty Paid) basis.
This means the price you pay at checkout includes:
- Your goods
- International shipping
- Applicable import duties
- Applicable taxes/VAT
- Customs clearance charges where applicable
Duties and taxes are included at checkout for the countries listed below. This means you should not be asked to pay additional import fees before delivery.
Countries currently shipped with duties and taxes included
North America
- United States
- Canada
European Union / Eurozone
- Austria
- Belgium
- Bulgaria
- Croatia
- Cyprus
- Estonia
- Finland
- France
- Germany
- Greece
- Ireland
- Italy
- Latvia
- Lithuania
- Luxembourg
- Malta
- Netherlands
- Portugal
- Slovakia
- Slovenia
- Spain
European Union / Non-Euro Currency Countries
- Czech Republic / Czechia
- Denmark
- Hungary
- Poland
- Romania
- Sweden
If your delivery country is listed above, duties and taxes are included at checkout and you should not be asked to pay additional import duties or taxes before delivery.
Please note that delivery times can still vary if customs require additional checks, but any applicable duties and taxes should already be covered where DDP has been selected and charged at checkout.
Rest of World — DAP
For all other international destinations outside of the countries listed above, orders are shipped on a DAP (Delivered At Place) basis.
This means the price you pay at checkout covers:
- Your goods
- International shipping
It does not include overseas sales tax, import VAT, customs duties, tariffs, or courier clearance/handling fees.
When your order reaches your country, local customs authorities may apply additional charges, including:
- Import VAT or local sales tax
- Customs duties or tariffs
- Courier handling or clearance fees
These charges are set by your country’s customs authority and are payable by you before delivery.
If charges are due, you’ll usually be contacted directly by the courier with a secure link to pay any applicable fees. Once cleared, your parcel will be released for delivery.
Estimated Delivery Times After Dispatch
Customs processing times vary by country and may extend delivery slightly.
If Import Charges Are Not Paid
For DAP shipments, if local import charges, taxes, duties or courier fees are not paid, or if delivery is refused, the parcel may be returned to us.
In this case, we will refund your order minus:
- The original outbound shipping cost
- Any return shipping fees charged to us
- Any customs, duty, tax or clearance fees billed to us by the courier
Estimating Import Costs for DAP Countries
Import VAT, duty and tariff rates vary by country. For an estimate, please contact your local customs authority or use your government’s official import calculator before placing your order.
If your delivery country is listed as a duties and taxes included destination above, your order will be shipped on a DDP basis.
More about delivery...
Need help?
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 14 days from delivery to return or exchange your item, provided it’s unused and in its original packaging.