SPB381J1
Designed for both deep-sea exploration and international travel, the Seiko Prospex SPB381J1 merges the rugged dependability of a diver’s watch with the added functionality of a GMT hand. Crafted with a 42mm stainless steel case with a super-hard coating and ceramic one-way rotating bezel, this timepiece offers durability and style in equal measure.
It features the in-house Calibre 6R54 automatic movement with manual winding capability, delivering an impressive 72-hour power reserve. The independent GMT hand lets you track a second time zone—ideal for globetrotters and professionals on the move.
Protected by a sapphire crystal with anti-reflective coating and water resistant to 200m, this watch ensures legibility and performance in any environment. With LumiBrite on hands and markers, and a three-fold clasp with secure lock, it’s a bold yet refined choice for the modern adventurer.
Movement
Calibre: 6R54
Movement Type: Automatic with manual winding
Power Reserve: Approx. 72 hours
Jewels: 24
Hand Winding Capability: Yes
Functions
GMT hand for second time zone
24-hour hand
Stop seconds hand function
Dial & Hands
LumiBrite: On hands and hour markers
Case
Case Material: Stainless steel with super-hard coating
Case Diameter: 42.0mm
Case Thickness: 12.9mm
Lug-to-Lug: 48.6mm
Crystal Type: Sapphire crystal
Crystal Coating: Anti-reflective coating on inner surface
Bezel: Ceramic one-way rotating bezel
Crown: Screw-down crown
Case Back: Screw case back
Strap/Bracelet
Band Material: Stainless steel
Clasp: Three-fold clasp with secure lock
Durability
Water Resistance: 20 BAR (200 metres)
