Founded in 1881 in Tokyo, Japan, Seiko is known for its in-house manufacturing and long-standing expertise in professional dive watches. The Prospex collection represents the brand’s commitment to high-performance tool watches designed for extreme underwater environments.

The Seiko Tuna Limited Edition of 800 pieces wolrdwide, reference S23627J1, is a professional saturation diver built for demanding conditions. The watch features a 49.4 mm titanium case with protective outer shroud paired with a black dial. Large luminous hour markers, bold hands, and the distinctive Tuna case construction ensure excellent legibility and durability. Powered by the Seiko caliber 7C46 quartz movement, it delivers high reliability and functions including hours, minutes, seconds, and date.

A sapphire crystal protects the dial, while the unidirectional rotating bezel supports precise dive timing. Water resistance is rated at 1000 meters. The watch is fitted on a rubber strap with a pin buckle.

This Tuna Limited Edition is in near mint condition and comes as a full set.