Authorised Alpina Retailer

Alpina Seastrong Diver 300 Heritage Automatic Watch

Colour: Black  · Ref: AL-520BY4H6
£1,268£1,492 save £224 · 15% off
VAT incl. · Free express delivery
Pay in 3 interest-free payments of £422.66 with PayPal.
Dispatched within 2 weeks
Authenticity
Authorized Alpina dealer
Warranty
Official Alpina warranty
Shipping
Free · DHL Express
Returns
30 days from delivery
Product specifications
Product specifications
Line
Seastrong
Reference
AL-520BY4H6
Movement
Automatic
Caliber
AL-520
Jewels
26 jewels
Power Reserve
38 Hours
Frequency
28.800 A/h
Case Material
Stainless steel
Bezel Function
Hour scale
Diameter
42 mm
Additional details
Additional details
Thickness
12.3 mm.
Crystal
Sapphire
Dial color
Black
Lume components
Hands
Crown
Screw-down
Case back
Screw-fastened
Water resistant depth
30 atm
Strap
Leather
Band color
brown
Clasp type
Buckle
Country of Manufacture
Switzerland
Warranty
3 years

 

Top highlights
Additional information:
  • The 2022 edition of the Seastrong Diver 300 Heritage embodies everything Alpina stands for: an athletic feel powered by state-of-the-art technology and vintage undertones in step with its heritage, inspired by the 10 Seastrong, the brand’s very first Super Compressor. This new watch stars something of a first for the Maison, too: a black face paired with an original calf brown strap. Thanks to its two push-buttons – one to set the time, the other to programme its mobile rehaut – the latest addition to the family stands out as the ultimate automatic dive watch, measuring 42 mm across and water-resistant up to 300 metres. Including an additional balck rubber strap.

Verified Reviews

FAQ

Yes, we are an Official   Alpina Authorised Dealer, and an authorised dealer for every brand we carry.

With over 15 years in the luxury market, we guarantee the authenticity and quality of every piece we sell.

Your order arrives brand new in its original Alpina packaging, with all official documentation and the Alpina warranty card, stamped and dated by us.

The warranty covers manufacturing defects. It doesn't cover normal wear and tear or accidental damage — and on watches, it doesn't cover straps, bracelets, or batteries.

Questions about a specific piece? Our specialists are happy to help. [Contact our team →]

Questions about a specific piece? Our specialists are happy to help.

[Please contact our team →]

Yes — free DHL Express shipping on all UK orders of £400 or more. 

  • Orders from £150 to £399.99 ship DHL Express for a flat £9.90
  • Orders under £150 ship DHL Express for a flat £19.90

Every order ships with a tracking number, so you can follow your package every step of the way. Shipments are fully insured and delivered by DHL Express with signature required.

Most in-stock orders arrive within 1-2 working days of dispatch.

No — the price you see at checkout is the price you pay.

Our prices include VAT, and nothing is added beyond the delivery charge shown.

DHL will never ask you for a payment on delivery, and no surprise invoice arrives afterward.

No handling charges, no processing fees, nothing added at the door.

We accept all major credit and debit cards, Apple Pay, Google Pay, PayPal, and bank transfer.

  • Credit and debit cards — Visa, Mastercard, American Express
  • Apple Pay and Google Pay — one-tap checkout, nothing to type
  • PayPal — with PayPal Buyer Protection on every purchase
  • Bank transfer — often the preference on higher-value orders

Every transaction is fully encrypted, and we never store your card details.

Paying in instalments. Choose PayPal at checkout and you may be offered the option to spread the cost, including interest-free plans on qualifying orders. Plans, terms and eligibility are set by PayPal and shown before you confirm, with no obligation.

Paying by wire, or buying more than one piece? [Contact our team →] and we'll take care of you personally.

You'll find availability on every product page, right above the Add to Cart button. Here's what each status means:

"Dispatched next working day" or "Only 1 left" — the piece is in our warehouse and leaves the working day after you order.

"Dispatched within X working days" — the piece is held at our secondary warehouse. We allow a few days to inspect and authenticate it before dispatch.

"Check delivery date" — the piece is available to order, but we confirm the exact date with the brand. As soon as you order, we contact the manufacturer and email you an estimated date.

Need something by a specific date? Tell us and we'll check before you buy. [Contact our team →]

You have 30 days from delivery to return your order.

How returns work. Just let us know and we'll email you a prepaid DHL Express return label — you never have to arrange a shipment or pay anything up front. The return cost is deducted from your refund. If the piece arrived damaged or wasn't what you ordered, the return is on us.

Your refund options.

  • Credit (issued as a gift card) — processed almost immediately once your return reaches us
  • Refund to your original payment method — typically 5–10 working days, depending on your bank

To qualify for a full refund, the piece must:

  • Be unused and in perfect condition, with no signs of wear
  • Include its original packaging and outer box
  • Include all original documentation, accessories, and the warranty card
  • Not be engraved or personalised — custom pieces are made to order and can't be returned

Not sure whether something qualifies? Ask us before you ship it back — we'll tell you straight. Contact our team.

TALK TO A SPECIALIST

Still have questions?

Our specialists are here before and after you buy — no pressure, no obligation. Authorised dealer, official warranty, and guaranteed authenticity on every piece.