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Seiko Prospex divers automatic modern re-interpretation GMT, SPB383J1. This modern re-interpretation of the 1968 Diver’s watch is inspired by Japan’s first hi-beat one-piece Diver’s watch created by Seiko.


The success of the 1968 model laid the foundation for Seiko Diver’s watch development which for sixty years has innovated in wearable, precise watches for professional and recreational divers.


This modern watch is powered by the new in-house Calibre 6R54 and is the first of Seiko’s diving watches with mechanical GMT functionality. Built for wearability: the bracelet fits comfortably due to its low centre of gravity and short-pitch – and durability: with a three-day power reserve and high-quality scratch resistant Japanese ceramic Diving scale, its water resistance is up to 200m.


Prospex is a combination of the words ‘Professional’ and ‘Specifications.’ Seiko Prospex timepieces are designed to be practical, reliable and durable; to meet the high standards required in extreme environments for sports lovers and adventure seekers alike.


Toulson Jones Jewellers are an official stockist of Seiko watches.

Seiko Prospex Divers Automatic Modern Re-Interpretation GMT, SPB383J1.

  • Accuracy: -15 ±25 seconds per month (±1 second per day)

    Calibre: 6R54

    Movement Type: Automatic 72 Hours Power Reserve

    Case Material: Stainless Steel

    Case Thickness: 12.9mm

    Case Diameter: 42mm

    Case Length: 48.55mm

    Lug Width: 20mm

    Dial Colour: Black

    LumiBrite: Lumibrite on hands and indexes

    Strap/Bracelet: Stainless Steel Bracelet 

    Clasp: Three-fold clasp with secure lock, push button release with extender

    Water Resistance: 20 bar/200m

    Crystal Type: Sapphire Crystal

    Other Specifications: GMT World Time

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