Seiko Presage Automatic Open Heart Men's Watch SPB311J1 Sharp Edged Blue

A blue Prospex diver for great depths: SPB311J1, 40.8 mm, 50 m

Collection

The Seiko SPB311J1 is part of the Presage Sharp Edged Series. Each model in this line is a horological interpretation of Japanese Kiriko glass, with a blue dial treated with geometric facets. Automatic 6R38, 40.8 mm, 70-hour power reserve.

Case

The stainless steel case of the Seiko SPB311J1 measures 40.8 mm in diameter and is 12.5 mm thick. The bezel is fixed. The dial is protected by a sapphire crystal, the most scratch-resistant, with an anti-reflective coating. The case back is exhibition (transparent), allowing the movement in operation to be observed. The water resistance is 50 m, suitable for swimming and splashing.

Movement

The Seiko SPB311J1 is powered by the automatic caliber 6R38, offering a power reserve of approximately 70 hours. The 6R caliber is the high-end of Seiko's series automatic movements: it features hacking and manual winding, and offers a significantly higher power reserve than 4R calibers. The dial aperture reveals the balance wheel and a portion of the gear train, making the mechanics directly observable on the wrist.

Strap

The leather strap of the Seiko SPB311J1, closed by a deployant clasp, complements the case with consistency. The lug width is 20 mm.

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