INTRODUCING: The Seiko Prospex S23635J

35 years on, the classic Seiko 1986 Quartz Diver's is re-born...

In 1986, Seiko launched a diver’s watch that set a new standard. It combined Seiko’s legendary 1975 design, the 1,000 metre water resistance required for saturation diving, and a quartz movement that delivered an accuracy no mechanical diver’s watch could match. At the time, and still today, it was recognised as one of Seiko’s most important diver’s watches. Today, 35 years on, this classic Seiko Diver’s watch is re-born with new design features and upgraded professional diver’s watch specifications. This is a watch that truly lives up to the promise of the Prospex name. Available now as a limited edition of 1,200 pieces worldwide.


Inheriting features from the past, introducing new features for today

This new watch inherits all the important design features and innovations which made both the 1975 mechanical and the 1986 quartz original so greatly trusted by the professional diving community. It has the 1,000m water resistance and helium resistance that saturation diving requires and incorporates the unique one-piece titanium case with its outer protector structure that makes its shock resistance so exceptional. It also has the accordion-style strap that ensures that the watch remains tight on the wrist at every depth. The outer protector is made of zirconia ceramic, which is seven times harder than steel, further enhancing its resistance to shock. The strap is now crafted from high grade, strong yet flexible silicone.



As a new safety and design feature, the crown is marked with a vivid yellow “Lock” sign and an arrow to indicate the rotating direction. The winding stem is also in yellow so that the wearer can immediately notice if the crown is unlocked. The white hour markers stand out against the dark dial so that they are easy to read at depth.



The watch is offered with extra-strength silicone straps in both black and blue-grey, ensuring wearability both over a wet-suit and directly on the wrist. Each strap features the text “FOR SATURATION DIVING 1000m” in yellow.

The watch is equipped with Seiko’s tried and trusted quartz Calibre 7C46 which delivers a high level of torque so that it can move the powerful hands that are wide, robust and Lumibrite-coated for maximum legibility. It also delivers a reassuringly long battery life of 5 years.

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