The blue of Okinawa on the case of the first Japanese diver's watch. The SBDC221 is a limited edition of 4,000 pieces that pays tribute to the coral reefs of Okinawa. Mounted on the legendary “62MAS” case (a reinterpretation of Seiko's first diver from 1965), this model raises performance to 300 meters and features the new 3-day 6R55 caliber. Its turquoise blue dial with a sunray texture captures the light as if it were the surface of the tropical sea. A collector's item that blends history and marine conservation.

🌊 “Okinawa Blue” dial: Forget champagne. This dial has a vibrant turquoise/blue tone inspired by the crystal-clear waters of Japan. It is a color that changes dramatically depending on the sunlight, shifting from deep blue to bright cyan.

🦄 Limited Edition (4,000 units): This is not a regular production model. It is engraved with “LIMITED EDITION” and the serial number on the back cover. There are only 1,000 units for Japan (JDM) and 3,000 for the rest of the world.

⚙️ New 6R55 Movement (72 Hours): A key improvement over the old 62MAS. This caliber gives you a full 3 days of power reserve. You can leave it on Friday and put it on Monday without having to adjust it.

🤿 Upgrade to 300m: The case retains its classic, compact dimensions (40mm), but Seiko has improved the engineering to certify it as a Diver's 300m (previously 200m). It is more robust and water-resistant than ever.

📏 Perfect Size (40mm): This is Seiko's “sweet spot.” Neither too big nor too small. The 1965 Heritage case fits any wrist thanks to its short, curved lugs.

Feature

Specification

Model

Seiko Prospex SBDC221 (Intl. Ref.: SPB545)

Limited

Edition “Save the Ocean” (4,000 pieces worldwide)

Movement

Automatic 6R55 (21,600 vph)

Power Reserve

72 Hours (3 Days)

Case Material

Stainless Steel with Ultra-Hard Coating (Dia-Shield)

Diameter

40.0 mm

Thickness

13.0 mm

Crystal

Curved sapphire with internal anti-reflective coating

Dial

Turquoise blue (Sunray)

Water Resistance

300 m / 30 BAR (Professional Diver's)

Bezel

Steel with black insert, unidirectional rotating