Seiko Prospex GMT Automatic Men's Watch SPB381J1 Green

The Green Prospex GMT: Automatic 6R54 with Secondary 24h Hand

Collection

The Seiko SPB381J1 belongs to the Prospex GMT range, which adds simultaneous dual time zone reading to the collection's dive watch DNA. The additional GMT hand is read on the 24h bezel, in a 42mm case water-resistant to 200m.

Case

Made of stainless steel, the case of the Seiko SPB381J1 measures 42mm in diameter and 13.8mm thick. The unidirectional rotating bezel allows for precise measurement of dive times. The dial is protected by a sapphire crystal, the most scratch-resistant, with anti-reflective treatment. The case back is solid screw-down. Water resistance is 200m, in accordance with ISO 6425 diving standards. The indexes and hands are coated with LumiBrite, Seiko's luminescent material for extended nighttime legibility.

Movement

The Seiko SPB381J1 is powered by the automatic calibre 6R54, offering a power reserve of approximately 72 hours. The 6R calibre is the top of the range of Seiko's series automatic movements: it features hacking and manual winding, and offers a significantly higher power reserve than 4R calibres.

Bracelet

The stainless steel bracelet of the Seiko SPB381J1, secured by a folding clasp, complements the case with coherence. The lug width is 22mm.

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