Grand Seiko Heritage "Katana" Spring Drive – SBGA491
Grand Seiko Heritage "Katana" Spring Drive – SBGA491
Grand Seiko Heritage "Katana" Spring Drive – SBGA491

Grand Seiko Heritage "Katana" Spring Drive – SBGA491

SKU: 001-545-10853

Regular price $5,600.00

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The SBGA491 Grand Seiko watch pays homage to the iconic Japanese katana sword, a symbol of masterful steelwork deeply entrenched in Japan's cultural legacy. Its dial pattern mirrors the unique texture of tamahagane, the revered "jewel" steel used in crafting these swords. The vibrant green dial draws inspiration from shingane, a particularly robust variant of tamahagane.

Encased in a 40mm diameter of stainless steel, the design reinterprets Grand Seiko's classic 44GS form to align with contemporary trends. The case boasts a striking, faceted design with flawlessly flat and mirror-polished surfaces, a testament to Grand Seiko's renowned Zaratsu finishing technique.

At its heart lies the Spring Drive caliber 9R65, seamlessly blending the potent torque of a mechanical watch with a high-precision regulator. Remarkably, it achieves an accuracy of one second per day. The second hand gracefully glides in a continuous, smooth motion—a distinctive trait of Spring Drive technology.

The SBGA491 exemplifies the fusion of heritage and innovation that defines Grand Seiko. Its meticulous craftsmanship and technological prowess pay tribute to the time-honored artistry of Japanese sword-making, resulting in a timepiece of exceptional precision and beauty.
Band Bracelet
Band Material Stainless Steel
Caliber 9R65
Case Material Stainless Steel
Case Size 40mm
Case Thickness 12.5mm
Caseback Display
Clasp Folding
Collection Heritage
Crystal Sapphire Crystal
Dial Green
Function Date - Power Reserve
Gender Men's
Lug Width 19mm
Lug-to-Lug 46.2mm
Movement Spring Drive
Power Reserve 72 Hours
Water Resistance 100m


Little Treasury Jewelers is the watch and jewelry store destination for the greater Baltimore-Annapolis area. Providing a piece for all of life’s occasions, offering a collection of wedding and engagement jewelry, fine timepieces, children’s jewelry, and gifts. With a selection of fine watches unequaled in the area, international jewelry designers, and a repair facility on the premise, Little Treasury is truly a “hidden gem” in Maryland.