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Seiko Prospex Marinemaster JAMSTEC 1968 Heritage Watch | Limited Edition | 300M | 42.6mm | Automatic | Blue
Ref: HBF002J1

View  Seiko Collection

Price £3,550.00
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As a Seiko Authorised Launch Partner, we are pleased to bring this watch to you. Release date: May 2026.

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Highlights:
  • Limited Edition watch.
  • In 1968, Seiko launched a revolutionary new innovation with the world's first hi-beat Diver's watch.
  • With a case design inspired by the original 1968 piece, carrying the name 'Marinemaster' from Seiko's heritage in diving watchmaking.
  • This limited edition Diver has been created in collaboration with JAMSTEC (the Japan Agency for Marine-Earth Science and Technology), inspired by the construction of the 'Mirai II;' Japan's first icebreaking polar research vessel.
  • The dial expresses the oceanographic research ship's trail through the ice; its thick transparent paint is polished to create a deep lustrous effect.
  • The dial has a satin-finished professional grade texture, purpose-designed to reduce light reflection for high contrast under water, optimised for diving conditions.
  • The case back features 'JAMSTEC Limited Edition' along with the individual limited edition number, with the serial number also engraved on the case back.
  • Strong lumibrite ensures clear visibility in low light, with a uni-directional bezel meeting ISO diving standards, featuring a ceramic insert bezel, super-hard coating, and stainless-steel with ceramic finish.
  • Crafted at the Shizukuishi Watch Studio in Japan's Iwate prefecture.
  • 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.
  • A blue gradient HMSD dial Seiko men's watch.
  • The mechanism used is 8L45 automatic movement. This calibre movement is complete with 35 jewels and a 72 hours power reserve.
  • A dual-curved sapphire crystal glass with an anti-reflective inner coating offers enhanced protection against scratches for everyday use.
  • Lumibrite hands and indexes make this watch easy to read wherever you are.
  • Displays date at the 3 o'clock position.
  • The dial features three hands and hour markers.
  • A streamlined stainless-steel case watch.
  • A stainless-steel bracelet with a three-fold clasp featuring a secure lock and push-button release, plus a solid slide adjuster for a secure and comfortable fit on the wrist.
  • 300m water-resistant watch.
  • 3 years manufacturer warranty.

Warranty3 Years
EditionProspex
Dial ColourBlue
Date FeatureDate display at the 3 o'clock position
Usually ForMen
GlassSapphire Crystal
Water Resistancy300 Metres
Case Width42.6mm
Case Thickness14.1mm
Case BackScrew
Case MaterialStainless-steel
Band MaterialStainless-steel
Band Width20mm
Band TypeBracelet
Clasp TypeThree-fold Clasp
BezelUni-directional
Bezel MaterialStainless-steel
CrownScrew-down
MovementAutomatic
Calibre8L45
Jewels35
Power Reserve72 Hours
Accuracy+10 to -5 seconds per day
Vibrations28,000 vibrations per hour (8 beats per second)
Magnetic Resistance4,800 A/m

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