Seiko Watch Prospex Tuna Saturation Divers S23633J1. Prospex Tuna 300m Saturation Diver’s Watch

This watch shape is affectionately nicknamed by Seiko fans as a ‘Tuna’ - because of its larger diameter and bold shape like a tuna tin - loved for decades since its release in 1975.

This new version has been updated from the original for increased legibility under water - the minute hand is emphasised by being arrow shaped, simpler circular and triangular indices are easy to distinguish underwater as well as improved visibility of the indicator ring on the rotating bezel.

Seiko Prospex watches are designed for sports lovers and adventure seekers whether in the water, in the sky or on land.

Since launching Japans first diver’s watch in 1965, Seiko’s innovative watchmaking has changed global dive watch standards.