The Seiko Prospex Automatic Diver – What Makes It Special

In the modern world of watchmaking, it’s no secret that the name “Seiko” is synonymous with one specific adjective unlike any other manufacturer or watch model: quality.

Although there are other adjectives that can be linked to the Japanese manufacturer’s timepieces, quality always fits them best because of how applicable it is. Regardless of the watch that’s being discussed, anything Seiko will always be considered top quality by all means. Even though technology and the Internet have changed the way businesses work today, Seiko still stays true to its tradition of paying attention to quality by sparing no details, never cutting corners, and maintaining top-level QC. 

While the standard of excellence and artisanal quality is a general expectation that will always apply to any Seiko timepiece, there’s one particular model from the line that stands out the most: The Seiko Prospex Automatic Diver (the Baby Tuna). 

A spitting image

Now, as amazing as the Seiko Prospex Automatic Diver may be with regards to quality, its framework definitely isn’t something new.

As a nod to one of the finest examples of the Japanese watch manufacturer’s timework, the timepiece borrows a key element of its looks from the MarineMaster Tuna—which is where the “Baby Tuna” name came from. When you put it on your wrist, you’ll quickly notice that there’s not much difference in premium feel between it and its higher-tier counterpart because Seiko didn’t spare anything when it came to the development of the Prospex.

What makes it so special?

With all this talk about the Prospex Automatic Diver, you’re probably wondering as to what exactly you’re buying into once you have your own piece. Whether you know the Prospex as the Tuna II or a new piece entirely, there are several defining factors that do the unique image of the watch as much justice as possible. If you want to know what makes this watch unique, here are several key factors to be mindful of: 

The bezel

Arguably its most critical defining factor, the Baby Tuna’s bezel is in a league of its own, thanks to its solid build. Easily distinguishable by the brushed steel bezel that has boldly defined numbers at the 3, 6, and 9 o’clock positions and a luminous ball at the 12 o’clock position, there’s no doubt that the bezel exudes rugged class. Furthermore, the distinguished component itself also rotates with the numbers 15, 30, and 45 on their respective positions to signify the number of minutes a diver has before needing to resurface—combining both form and function.

The hands

When you focus on the Prospex Automatic Diver, you’ll quickly notice that one of its most striking features that jumps right out are the hands that crown its definitive dial. Compared to other models on the market, the Baby Tuna’s hands are extremely unique, as they sport a luminous stubby hour hand that does not cover any of the luminous markings nor the minute indicators underneath them. To bring balance and symmetry to the mix, the minute hand retains the same size as most watches (but they are noticeably luminous for easier time-telling)!

The case

One of the most unique aspects of the Baby Tuna that makes it the future classic is its distinctive casing. Despite its nomenclature, the Prospex Automatic diver is not a “baby” by any means because it possesses a whopping 50mm diameter, but comfort isn’t compromised in this regard due to its scallop-like curving. Following Seiko fashion, the Baby Tuna maintains the same maximum watertight sealing as many other models, thanks to a crown that’s uniquely placed at the 4 o’clock position! 


While Seiko itself is widely known for the level of quality that it has brought to the watchmaking world, it’s worth mentioning that no other model on the market carries the torch today better than the Prospex Automatic Diver. If you’re looking for a new timepiece that is special as it is dependable and attractive, then this is the watch for you! 

If you’re looking for ways to make your Diver watch and bezel stand out, then SeikoMods has got your back! We’re the leading supplier of Seiko mod parts in the UK that offers various items to make any model unique. Visit our website and start building your very own personalized Seiko timepiece today!

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