









Seiko 5 Automatic Black Dial Steel Strap Men's Watch SNK381K1
Official UK Authorised Retailer
3 Year Manufacturer Warranty
Free Delivery
Easy Returns
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Seiko 5 Automatic SNK381K1 is a classic automatic wristwatch from Seiko’s iconic Seiko 5 series, known for its timeless design and reliable mechanics. This model combines enduring style with practical functionality, featuring a striking black dial and a polished stainless-steel case and bracelet that suit both everyday wear and smarter occasions.
A Trusted Automatic Movement
At the heart of the SNK381K1 is Seiko’s Calibre 7S26 automatic movement, a dependable mechanical calibre that offers an approximate 40-hour power reserve, eliminating the need for batteries and reflecting Seiko’s heritage of robust and precise timekeeping. In addition to keeping accurate time, the movement drives a combined day and date display at the 3 o’clock position.
A Dial of Clear Functionality
The black dial provides a clean and balanced backdrop for silver-tone Arabic numeral markers and luminous hands that ensure excellent legibility in varied lighting conditions. A minute track around the outer rim enhances time reading, while the Hardlex crystal protects the dial from daily wear.
Refined Craftsmanship and Design
The polished stainless-steel case measures approximately 37mm in diameter, offering a classic wrist presence that is both comfortable and versatile. The see-through case back reveals the automatic movement in action, adding a layer of mechanical allure. The integrated stainless-steel bracelet secures with a fold-over clasp and push-button release for everyday practicality.
Built for Everyday Versatility
With water resistance rated to 30 metres (3 bar), the Seiko SNK381K1 is robust enough to withstand splashes and light rain, making it suitable for daily life. The combination of a reliable automatic movement, practical day-date functionality and classic design makes this timepiece a versatile companion that transitions seamlessly from casual wear to more polished settings.
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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.
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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.

