Alpina Seastrong Diver 300 Heritage

Alpina Seastrong Diver 300 Heritage
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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 green face paired with an original green rubber 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. 

Alpina Seastrong Diver 300 Heritage

Diving watches are a relatively recent chapter in the history of watch-making, and Alpina has been making waves in the field from the very start. Now one of the House’s most iconic timepieces, the Super Compressor 10 Seastrong divers watch was first introduced in 1969. Water-resistant up to 200 metres, it was anti-magnetic and featured Super Compressor trademark casing: two crowns, one of which controls the internal rotating bezel, used to measure the passing of time on a scale of one to 60 minutes.

Alpina Seastrong Diver 300 Heritage

It’s safe to say that the design has withstood the ebbs and flows of trends and fashions, with the recent Seastrong watches now firmly rooted on the shores of the present day. In 2016, Alpina launched its Seastrong Diver Heritage range in a tribute to the historical design. So much more than a replica, the series was a fresh take on a vintage classic. In 2022, the House unveiled its latest riff on a firm favourite, this time all decked out in green, making it without a doubt the most contemporary of the last few editions of Alpina’s iconic diver. 

Alpina Seastrong Diver 300 Heritage

Diving head first into green

For this new version, Alpina opted for all-over green, from dial to strap. Generally a mainstay of pilots’ watches, green is rarely associated with diver’s watches. This year, Alpina decided to wander off the beaten path with a shade symbolic of underwater life and biodiversity: a tribute to the ocean, Earth’s largest ecosystem. A glossy, radiant finish scatters light evenly across the face in a glow reminiscent of sunshine reflecting off the surface of the water. 

Alpina Seastrong Diver 300 Heritage

This mirror-shine effect serves to further enhance the different shades of green used while improving clarity of the hour and minute hands – a crucial feature for any diver’s watch. Alpina also included a trio of large hands to ensure the Seastrong Diver 300 Heritage is functional and genuinely usable in action. Each of the three hands is luminous, and the minute hand is topped with a generous arrow pointing up to indices that glow just as brightly, making sure that divers are never left guessing just how long they’ve been in the water. 

Alpina Seastrong Diver 300 Heritage

The ultimate diver

Immersion times are calculated using the Alpina Seastrong Diver 300 Heritage’s black bi-directional rehaut, which can be adjusted using the upper crown positioned at the two o’clock mark. The timer can be set for dives for up to 60 minutes. Positioned opposite the minute hand, it instantly counts time spent under water, or any other timespan divers may like to work with, such as remaining oxygen time or decompression limits. The second crown is set above the four o’clock mark and can be used to change the time.

Alpina Seastrong Diver 300 Heritage

These two screw-down crowns prevent any mishaps when handling the watch once the time and rehaut have been set.  In terms of fittings, the Alpina Seastrong Diver 300 Heritage puts the emphasis on sturdiness thanks to its steel casing: polished and brushed on the sides, measuring 42 mm across and water-resistant up to 300 metres. It boasts a full steel caseback engraved with Alpina’s beloved Alps and embellished with a trident in a nod to the watch’s maritime flavour, and is anchored to a new green rubber strap that is sand-, sea salt- and corrosion-resistant. Self-winding with a high frequency of  28’800 alt. /h, the Seastrong Diver 300 Heritage offers 38 hours of power reserve. 

Alpina Seastrong Diver 300 Heritage Technical Specifications

Reference AL-520GR4H6 – RRP 1550€


  • Hours, minutes, seconds


  • AL-520 calibre, automatic
  • 38-hour power reserve, 26 jewels, 28’800 alt/h
  • Case: Polished and brushed stainless steel 2-part case
  • Diameter of 42 mm
  • Height of 12,30 mm
  • Scratch-resistant glass box sapphire crystal
  • Water-resistant up to 30ATM/300m/1000ft
  • Screw-in crowns and case back
  • Engraved case back


  • Green dial with sunray finishing and applied silver colour indexes
  • Black internal revolving 60min diver bezel with white minutes and seconds graduation
  • Silver colour hour, minute and second hands filled with white luminous treatment


  • Green rubber strap

Founded in 1883 and famous for its iconic red triangle, Alpina is a Swiss watch manufacturer based in Geneva. The brand set out to design luxury sports watches offering exceptional accuracy and reliability in the most challenging sporting environments, like the Alps.
A true pioneer of the watchmaking industry, Alpina has been the source of numerous patents and innovative calibres over the past 138 years. At the beginning of the 20th century, Alpina became the official supplier of watches to military pilots, before revolutionising the concept of sports watches in 1938 with the legendary Alpina 4. 
True to its long tradition of innovation, Alpina launched the first Swiss made Horological Smartwatch in 2015, creating a new segment in the luxury Swiss sports watch market. In 2020, the brand introduced the AlpinerX Alive, a new generation of connected watches equipped with a heart rate monitor and GPS, among other things. Also committed to protecting the planet, Alpina created the Seastrong Diver Gyre Automatic range using recycled plastic from the oceans. In 2021, the brand is doubling down on its promise to get involved with organisations fighting to protect the environment. Joined together by the unifying principle We Shape the Change – the environmental equivalent of Reach Your Summit – Alpina will undertake a variety of measures aimed at drawing public attention to current environmental issues. 
Inspired by the Alps from the very beginning, Alpina has always been heavily involved in outdoor activities and mountain sports. The brand has established strong partnerships demonstrating its commitment to this world, as well as a team of ‘Alpinists’, including athletes and friends of the brand working in the most challenging environments. 

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