Product image of SBGA491

USA Special Edition
Inspired by the Katana
SBGA491

SBGA491G

SBGA491

Heritage Collection

USD 5,600.00

Features

Artistry of the Katana—U.S. Exclusive Models influenced by the materials and craft of the blade.

The Japanese sword, known as the katana, is a world-renowned masterpiece in steel. Crafted through a distinctive and sophisticated process, the katana has created fascination and allure the world over.

Derived from nature and brought together through expert craftsmanship, the katana is made from earth, fire, water, and air. Iron sand is drawn from the earth and then heated in a furnace known as a tatara. The melted sand forms the Japanese steel, known as tamagahane.

From this Japanese steel, two variations can be found. The first is the high-carbon steel used for the outer sharp edge, or kawagane, and the second is the strong inner core of the blade, or shingane. Grand Seiko honors the katana and shingane with the U.S.-exclusive SBGA491.

Specifications

Exterior
Exterior: Stainless steel
Case back: See-through & Screw case back
Glass Material: Dual-curved sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
Case size: Diameter 40.0mm Lug-to-lug 46.2mm Thickness 12.5mm
Band width: 19mm
Clasp type: Three-fold clasp with push button release
Movement
Caliber no.: 9R65 Instructions
Movement Type: Spring Drive
Power reserve: Approx. 72 hours(3 days)
Accuracy: ±15 seconds per month (±1 second per day)
Functions
Water resistance: 10 bar
Magnetic resistance: 4,800 A/m
Other details / Features:
  • Screw-down crown
  • 30 jewels
  • Power reserve indicator

 

 

Polishing the katana requires handcraft of tremendous skill and dexterity, and the same can be said of crafting Grand Seiko watches using the Zaratsu polishing method, particularly the 44GS case design, which established the Grand Seiko style in 1967.

 

 

The resilience and strength of shingane inspire the green dial of SBGA491, whose dial pattern evokes the unique texture in the variations of tamahagane, the “jewel” steel from which traditional katana swords are fashioned.

 

Caliber 9R65 uses sophisticated modern technology coupled with the skilled hand of a master craftsman for the finest adjustments and highest precision possible, highlighting the seamless passage of time with a Spring Drive movement.

Learn more about Caliber 9R65