Crafted exclusively for the U.S. market, the Seiko Prospex SPB351 is a striking interpretation of Seiko’s legendary dive heritage. Inspired by the mineral-rich hues of underwater cave formations, this titanium diver’s watch blends natural beauty with elite performance—engineered for those who explore deeper.

Key Features

Distinctive U.S. Market Design

• Special Edition crafted exclusively for the United States

• Light blue-gray textured dial evokes mineral deposits in submerged cave systems

• Two-tone unidirectional bezel enhances depth and clarity

Built for Professional Diving

• Titanium case and bracelet with super-hard coating—lightweight yet ultra-durable

• Screw-down crown and caseback for added underwater security

• 200m water resistance, compliant with ISO standards for scuba diving

High-Performance Movement

• Caliber 6R35 – Automatic with manual winding capability

• Power reserve: Approximately 70 hours

• 21,600 vibrations per hour | 24 jewels

• Date calendar at 3 o’clock

Superior Legibility & Comfort

• LumiBrite hands and markers for visibility in low light

• Sapphire crystal with inner anti-reflective coating

• Case size: 43.5 mm diameter | 13.3 mm thickness | 51.0 mm lug-to-lug

• Lug width: 22 mm

• Clasp: Tri-fold with push-button release, secure lock, and diver’s extender

The Seiko Prospex SPB351 U.S. Special Edition is a titanium tool watch that marries professional diving capabilities with a design rooted in nature’s most elusive terrain. Lightweight, resilient, and visually captivating, it is a refined expression of Seiko’s commitment to precision under pressure.