Seiko Prospex Sea King Sumo Automatic Men's Watch SPB321J1 Blue

Prospex Automatic Diver: SPB321J1 in blue, 6R35, 200 m

Collection

The Seiko SPB321J1 belongs to the Prospex collection, Seiko's technical range dedicated to outdoor and nautical activities. Water-resistant to 200 m, equipped with the 6R35 caliber with a 70-hour power reserve, it meets the requirements of divers and athletes who do not want to sacrifice robustness for aesthetics.

Case

The case of the Seiko SPB321J1 is made of stainless steel, with a diameter of 44.3 mm and a thickness of 13.4 mm. The unidirectional rotating bezel allows for precise measurement of dive times. The protection of the blue dial is ensured by a sapphire crystal, the most scratch-resistant, with anti-reflective treatment. The case back is solid screw-down. The water resistance is 200 m, compliant with ISO 6425 diving standards. The indexes and hands are coated with LumiBrite, Seiko's luminescent material for extended nighttime legibility.

Movement

The Seiko SPB321J1 is powered by the automatic caliber 6R35, offering a power reserve of approximately 70 hours. The 6R caliber is the high-end of Seiko's standard automatic movements: it features hacking and manual winding, and offers a significantly higher power reserve than the 4R calibers.

Bracelet

The Seiko SPB321J1 is equipped with a stainless steel bracelet, both robust and easy to maintain, fastened by a deployant clasp, which makes it easy to put on and remove the watch while securing the strap to the wrist. The lug width is 20 mm.

Supplied with: Storage box, presentation pad, user manual.