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GRAND SEIKO CORPORATION OF AMERICA Spring Drive U.F.A. Ushio 300 Diver

$12,400.00

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Pickup available at 300 S Maple Rd

Usually ready in 24 hours

In 2025, Grand Seiko unveiled the Spring Drive Caliber 9RB2, a groundbreaking movement that received the then-new U.F.A. designation, standing for “Ultra Fine Accuracy.” Boasting an annual accuracy rate of ±20 seconds, Caliber 9RB2 earned the distinction of being the most accurate wristwatch movement powered by a mainspring.* This model is powered by Caliber 9RB1, featuring an improved construction that makes it ideal for sporting conditions while sharing the same attributes as the Caliber 9RB2.
The term ushio, which means “tide” in Japanese, evokes the waters that surround the Japanese archipelago. This creation’s blue dial reflects the vast expanse of the sea through a gradient that captures light streaming into the deep ocean.
* As of April 2026, based on Grand Seiko’s research.

Shipping & Returns

Lewis Jewelers offers free, fast shipping to all of our shipping destinations within the continental U.S., on all jewelry. In addition to free shipping, you can rest assured in knowing that your items are securely packaged and fully insured while in-transit to your home or office. ORDERS WILL SHIP OUT THE NEXT DAY AFTER THE ORDER IS PLACED for delivery for IN STOCK ITEMS ONLY.

· In store pick up - Free·· UPS 2 day - $40.00 (Free for orders above $300.00)· UPS Overnight - $60.00 (Free for orders above $500.00)

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