Seiko Prospex Marinemaster HBF002J1 Men's Watch • JAMSTEC Limited Edition • Automatic Movement Calibre 8L45

The Seiko Prospex Marinemaster HBF002J1 is an exclusive top-tier diver's watch, limited to 1,000 pieces worldwide. It combines the aesthetics of the iconic Marinemaster design from 1968 with state-of-the-art manufacturing precision and is dedicated to the renowned Japanese marine research institute JAMSTEC. The high-grade stainless steel case, measuring 42.6 mm in diameter and 14.1 mm in thickness, houses the in-house automatic movement Calibre 8L45 with manual winding, offering a power reserve of approximately 72 hours.

The watch is water-resistant to a depth of 300 metres, making it a reliable companion for demanding diving missions. The double-curved sapphire crystal with inner anti-reflective coating protects the dial optimally against reflections and scratches. LumiBrite luminous material on the hands, indices and bezel ensures excellent legibility even in low-light conditions. The screw-down crown and screw-down case back underline the professional character of this exceptional diver's watch. The serial number is individually engraved on the case back.

Key Features of the Seiko HBF002J1 Watch

• Automatic Calibre 8L45 with manual winding, 35 jewels, 28,800 vibrations per hour and approx. 72 hours power reserve
• Professional diver's watch with 300 m water resistance, unidirectional rotating ceramic bezel, screw-down crown and screw-down case back
• Limited Edition of 1,000 pieces worldwide, with individually engraved serial number on the case back

Care Instructions for Wristwatches

Care & Cleaning

• Daily: Wipe case and bracelet with a soft, dry cloth to remove dirt and perspiration.
• Water-resistant watches: Clean with mild soapy water and a soft brush, rinse, dry thoroughly.
  Important: Screw the crown down firmly beforehand!!!
• Not water-resistant: Clean only dry or slightly damp, do not use water or cleaning agents.
• Avoid: Aggressive agents, perfume, cosmetics and heat.
• Leather straps: Do not soak, clean only slightly damp and allow to dry away from heat.
• Water resistance: Do not wear in the shower or bath, have checked annually.
• Battery (quartz): Have a depleted battery replaced immediately.
• Mechanical watches: Service by a master watchmaker every 5 years.

Storage & Handling

• Store watch separately, not directly with other jewellery (risk of scratching).
• Set mechanical watches down when winding, do not leave the crown pulled out.