Seiko Prospex SPB257 Black Series Limited Edition Automatic Diver – 42.7 mm Japanese Dive Watch

The Seiko Prospex SPB257 Black Series Limited Edition is a standout diver’s watch that blends iconic heritage design with modern performance and exclusive appeal. Inspired by Seiko’s 1970 dive watches and the legendary “Willard” style, this limited edition timepiece is built for enthusiasts who appreciate rugged reliability and distinctive aesthetics.

Powered by Seiko’s robust automatic Calibre 6R35 movement, the SPB257 delivers approximately 70 hours of power reserve, reliable accuracy, and the convenience of both automatic winding and manual winding capability. Its 42.7 mm stainless‑steel case with hard coating and a curved sapphire crystal with inner anti‑reflective coating ensures lasting durability and excellent legibility under all conditions.

This diver’s watch is water‑resistant to 200 m / 660 ft, making it suitable for genuine diving and daily active wear. The black dial features luminous hands and markers for clear reading in low light, while the unidirectional rotating bezel and screw‑down crown reinforce its dive‑ready credentials.

Each piece in this edition is part of a limited run of 5,500 units worldwide, offering collectors and watch lovers a unique and sought‑after addition to any collection.

Key Features:

• Automatic Seiko Calibre 6R35 movement with ~70 h power reserve

• Limited edition design (5,500 pieces worldwide)

• Water resistance to 200 m / 660 ft for genuine diving use

• Curved sapphire crystal with anti‑reflective coating

• Unidirectional rotating bezel and screw‑down crown

• Lumibrite hands and markers for low‑light visibility