




Casio G-Shock Digi-Analogue Black Dial Resin Strap Men's Watch GA-100-1A4ER
Official UK Authorised Retailer
Full Manufacturer Warranty
Free Delivery
Extended Christmas Returns Until 15th Jan 2026
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Casio G-Shock Digi-Analogue Black Dial Resin Strap Men's Watch GA-100-1A4ER
The Casio G-Shock GA-100-1A4 is a bold and highly durable analogue-digital watch designed for everyday reliability and demanding conditions. Its large black resin case delivers the recognisable toughness of the G-Shock line, while the vivid red accents on the hands and sub-dials provide a striking contrast that enhances readability. The oversized layout gives the watch a commanding presence without compromising practicality.
Precision and Reliability
Powered by a quartz movement, the GA-100-1A4 offers accurate and stable timekeeping supported by a broad range of practical functions. These include a 1/1000-second stopwatch with speed indicator, countdown timer, world time, five daily alarms, and a full auto-calendar. The digital and analogue displays are arranged to ensure information is clear and accessible, even during active use. With 200 metres of water resistance, the watch is well-suited to swimming, watersports, and environments where reliable protection is essential. Shock resistance further enhances durability, allowing it to withstand impacts and rough handling.
Design and Comfort
Despite its substantial dimensions, the watch is designed for comfortable wear throughout the day. The resin strap is flexible and secure, distributing the weight of the case evenly on the wrist. Mineral glass protects the dial, while raised markers and recessed digital windows create a sense of depth and structure. Large, textured buttons improve grip and make operation straightforward, even when wearing gloves. The overall design blends robustness with thoughtful ergonomics, ensuring the watch remains functional in a wide range of situations.
Versatile Style
The GA-100-1A4 is ideal for those who want a tough, high-function watch with a bold aesthetic. Its combination of durability, practical features and distinctive red detailing makes it suitable for sports, outdoor activities, and everyday wear. The model showcases G-Shock’s commitment to blending rugged engineering with dynamic styling, delivering a dependable companion for active lifestyles.
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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 Shipping & Duties (Delivered At Place – DAP)
We’re pleased to offer worldwide delivery with fully tracked and insured shipping.
How international orders work
All international orders are shipped on DAP (Delivered At Place) terms. This means:
- The price you pay at checkout covers your goods and international shipping only.
- WatchNation does not collect or charge any overseas sales tax, import VAT, or customs tariffs (duties).
- When your order reaches your country, local customs authorities may apply:
- Import VAT (value-added tax),
- Tariffs or customs duties (import taxes based on product category and value), and
- Handling or clearance fees from the courier.
These charges are set by your country’s customs authority and are payable by you before delivery.
You’ll be contacted directly by DHL with a secure link to pay any applicable charges. Once cleared, your parcel will be released and delivered promptly.
Estimated delivery times (after dispatch)
- European Union: approximately 2–5 working days
- Rest of World: approximately 5–7 working days
Customs processing times vary by country and may extend delivery slightly.
If import charges, tariffs, or duties are not paid
If local charges are unpaid or delivery is refused, the shipment will be returned to us. In this case, we will refund your order minus the outbound shipping cost and any return or customs fees billed to us by the carrier.
Estimating import costs
Import VAT and duty rates vary by country. You can check estimated import taxes and tariffs by contacting your local customs authority or using your government’s online import calculator.
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 30 days from delivery to return or exchange your item, provided it’s unused and in its original packaging.



