Authorized Alpina Retailer

Alpina Seastrong Diver 300 Heritage Automatic Watch

Color: Black  · Ref: AL-520BY4H6
$1,795
Ships within 2 weeks
Authenticity
Authorized Alpina dealer
Warranty
Official Alpina warranty
Shipping
Free · DHL Express
Returns
30 days from delivery
At a Glance
At a Glance
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
Specifications
Specifications
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

 

About This Piece
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 Authorized Dealer, and an authorized 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.

Please contact our team.

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

"In stock, ships within 24 hours" or "Only X units left" — the item is in our warehouse and ships the next business day after you order.

"In stock, ships within X days" — the item is held at our secondary warehouse. We allow a few days to inspect and authenticate it before it ships.

"Check delivery date" — the item 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 delivery date.

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

Yes — free DHL Express shipping on all US orders of $250 or more.

  • Orders from $150 to $249.99 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 2–3 business days, depending on your location.

No, the price you see at checkout is the price you pay — nothing else.

The price you pay at checkout is the final price of the item delivered to your address.

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 wire 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 wire transfer — often the preference on higher-value orders

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

Financing. Choose PayPal at checkout and you may be offered the option to split your purchase into payments or finance it over time, including interest-free plans on qualifying orders. You'll see exactly what's available for your order before you confirm — plans, terms, and eligibility are set by PayPal and subject to their approval, with no obligation to take it.

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

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 shipping cost is deducted from your refund. If the item arrived damaged or wasn't what you ordered, the return is on us.

Your refund options.

  • Store credit (issued as a gift card) — processed almost immediately once your return reaches us
  • Refund to your original payment method — typically 5–10 business days to appear, depending on your bank or card issuer

To qualify for a full refund, the item 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 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. Authorized dealer, official warranty, and guaranteed authenticity on every piece.