A rugged tool watch inspired by the 'Black Stream' ocean currents

The oceans that surround the Japanese archipelago are criss-crossed by water currents of great power. One such is the Kuroshio Current, also known as the Black Stream. It flows northwards past Japan towards the North Pacific and is one of the largest ocean streams in the world. The dynamic and sometimes violent tides caused by the Black Stream inspire the deep black color and richly textured surface of the dial of this new 200m diver’s watch. Powered by Spring Drive Caliber 9RA5, it offers an accuracy rate of ±10 seconds per month and a generous five day power reserve. The inner section of the rotating bezel is in ceramic to protect the watch from being scratched. 

Based on the Grand Seiko Style which has inspired each and every creation since 1967, the Evolution 9 Collection takes the legibility and comfort of Grand Seiko to a new level, and represents a glimpse into the future of Grand Seiko. 

Case

• Case Material: High-intensity titanium
• Glass Material: Sapphire
• Glass Coating: Anti-reflective coating on inner surface
• Case size: Diameter 43.8mm (13.8mm thick)
• Strap: Titanium bracelet with tri-fold clasp with push button release, secure lock and wetsuit extension
• Bezel: IP-coated ceramic, unidirectional rotating

Movement

• Caliber no: 9RA5
• Movement Type: Spring Drive (Automatic)
• Power reserve: 120 hours (5 days)
• Accuracy : ±1 seconds per day (± 15 seconds per month)

Functions

• Water resistance : 20 bar (200 meters)
• Magnetic resistance : Equipped
• Other details / Features :

• ・Date display
• ・Solid, screw case back
• ・Screw-down crown
• ・Stop seconds hand function