Introducing the Alpina Seastrong Diver 300m

The Seastrong Diver has been a staple of Alpina’s lineup since the 1960s. It’s always been a solid tool watch, and in recent years has been the canvas onto which Alpina has drawn many of their newest dive watch designs. The newest edition to the Seastrong line is the 44mm Seastrong Diver 300, available in stainless steel with both titanium and bronze PVD coating. Its design takes cues from the Seastrong 10, Alpina’s classic ’60s diver, which was rated to an extremely impressive-for-the-time depth of 200 meters. With 300 meters of water resistance, this modern version is upsized not just in dimensions, but technical specs as well. Let’s take a closer look at some of the details.

Alpina Seastrong Diver 300m

  • Case Material: Stainless steel with either titanium or bronze PVD coating
  • Dial: Gray, navy blue, black
  • Dimensions: 44mm x 13.06mm
  • Crystal: Sapphire
  • Water Resistance: 300 meters
  • Crown: Screw down
  • Movement: AL-525 automatic caliber, 26 jewels, 38 hours power reserve, 28,800/h
  • Strap/Bracelet: leather, with extra rubber strap included
  • Price: $1,395
  • Expected Release: Available now

First and foremost, this watch has options galore. In addition to the two distinct case finishes, Alpina is offering the Seastrong in grey, blue, and beige dial/bezel combinations. There would seem to be something for everyone’s taste, but I would think the bronze PVD coated case with a brown bezel and black dial is the most in tune with the general vibe the watch is putting out. I like the idea and (on a serious budget) this could be a fun summer look.


The case itself has a stepped design that almost has the appearance of a cushion case from the top with lots of sharp angles. The crown guards are particularly well executed. The lines don’t flow together so much as they build on top of each other, which will be off putting to some, but all credit to Alpina for going all in on a very technical design.

With large sword hands, generous lume, and a crosshair dial, readability should not be a problem with the Seastrong regardless of whether you’re at depth or topside. Of course, it will also be easy to read even if you don’t happen to be around water at all, which is probably advisable until you replace the stock leather strap with the included rubber. Leather with a big dive watch like this is a hard “no” if you plan to use the watch for remotely related to its intended purpose. Again, credit to Alpina for including a functional rubber strap in the package.

At a suggested price of $1,395, the Seastrong enters a crowded dive watch market. If you have large wrists or just a preference for a big watch and happen to like the aesthetics (which are classic, and absolutely on-brand for Alpina) this could be a compelling option. Alpina

What do you think about the latest offering from Alpina? Let us know by leaving a comment below.

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Zach is a native of New Hampshire, and he has been interested in watches since the age of 13, when he walked into Macy’s and bought a gaudy, quartz, two-tone Citizen chronograph with his hard earned Bar Mitzvah money. It was lost in a move years ago, but he continues to hunt for a similar piece on eBay. Zach loves a wide variety of watches, but leans toward classic designs and proportions that have stood the test of time. He is currently obsessed with Grand Seiko.