Seiko 'Tuna' Style Automatic Professional Diver's Watch

This is a robust mechanical diver's watch featuring a distinctive 'shrouded' case design, popularly known among collectors as the 'Tuna' style. The timepiece is characterized by an oversized, round stainless steel outer shroud intended to protect the inner case and rotating bezel from impact. The dial is deep matte black with high-contrast, luminescent block indices and a date aperture located at the 3 o'clock position. The oversized hands, including a broad arrow-tipped minute hand, are designed for maximum legibility underwater. The dial is marked with '660ft = 200m AUTOMATIC PROFESSIONAL,' indicating a water resistance rating suitable for scuba diving. The rotating dive bezel features a two-tone aesthetic, with a champagne or light gold colored insert displaying a 60-minute scale. The construction includes a screw-down crown positioned at the 4 o'clock mark to prevent snagging. Condition-wise, the watch appears to be in very good used condition; there is minimal visible wear to the shroud and no significant scratching on the crystal or bezel insert. The lume on the markers appears bright and clean, suggesting a modern production era, likely within the last 5 to 10 years. This style of watch is prized for its industrial-tool aesthetic and durable vertical profile.