Seiko Prospex Luxe

Seiko Prospex Tuna Dive Watch Black S23631 Quartz

Seiko Prospex Tuna Dive Watch Black S23631 Quartz

Authored By William DePaula

The Seiko Professional Diver Tuna

Limited Edition 

Seiko Prospex S23631 - $2,400

In Stock

The S23631 is a remarkable professional dive watch.  With a saturation depth of 1000m it is hard to imagine needing anything more in a dependable dive watch.  The S23631 is a Seiko Tuna, a name lovingly given to the watch by Seiko fans.  The name comes from the shroud that covers the watch.  This shroud is what makes the watch able to go to such depths and be a saturation diver.  

This watch is a cool watch that has hardly seen any changes in design since it's conception in 1975.  The S23631 is a quartz watch where the movement was designed to handle great depths.  The good part about a quartz watch is that you don't have to keep setting it after taking it off for a few days like an automatic watch.  The watch is made of select materials like ceramic and titanium.  It also has a sapphire crystal which helps prevent scratches on the crystal.  There is also an anti-glare coating, that helps from getting and reflections when diving.

Let's just get this out into the open, the Seiko Tuna is not for everyone.  It is not elegant in a dress watch sort of way and really that is a good thing.  The Seiko Tuna makes no apologies for what it is, it is a professional dive watch and a tool watch.  This is the type of watch that makes you stand out in a crowd.  It says you love the water and enjoy unique watch design.



1975 Saturation Diver's Watch Reinterpretation. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style. Part of a rich legacy of innovation in high-intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence with recreations and reinterpretations of landmark achievements. Honoring the first watch designed to withstand the dangerous world of the professional diving, Seiko's 1975 saturation diver, with its one-piece case, outer shroud and revolutionary L-shaped protective gasket, this extraordinary reinterpretation retains the solid can-like lines and functionality of the original, improved with upgraded specifications and materials. Following ISO standards for diving to depths of up to 1,000 meters, this powerful saturation diver features a one-piece inner case in light and durable titanium, as well as a ceramic outer case. The one-way rotating elapsed timing bezel is crafted of stainless steel with black super-hard coating. Arrow shaped minute hands, simple geometric indices, narrower bezel markers and LumiBrite enhancement offer sharper legibility, while the sapphire crystal provides improved scratch resistance. With secure screwdown crown, silicone strap and day/date calendar, this updated design is powered by a unique extended-life quartz battery with increased torque, engineered specifically for diver's watches. 1,000m Water Resistant.


1975 Saturation diver's modern interpretationBlack one-way rotating elapsed timing bezelBlack dial
Day/date calendarLumiBrite hands and markers


Thickness: 14mm
Diameter: 47mm
Length: 46.6mm
CASE: Ceramic outer case, titanium monobloc inner case
CRYSTAL MATERIAL: Dual-curved sapphire crystal with anti-reflective coating on the inner surface
STRAP: Black silicone strap
Caliber 7C46
5 years battery life
WATER RESISTANCE: 1,000 meters (3,300 feet); follows ISO standards and is suitable for saturation diving


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