Seiko Marinemaster 1968 Heritage JAMSTEC Limited Edition HBF002J1

Seiko's legacy of testing the limits of modern sports watchmaking and supporting marine conservation continues through its partnership with the Japan Agency for Marine-Earth Science and Technology (JAMSTEC), which began in the 1980s. In 1983, two professional diver's watches rated to 600 meters were successfully tested aboard the SHINKAI 2000, a manned research submersible operated by JAMSTEC.
Inspired by the spirit of daring exploration that connects JAMSTEC and Seiko, a new limited-edition Diver's watch joins Prospex's flagship Marinemaster series.

Limited edition of 1,000 pieces

MOVEMENT
Caliber: 8L45
Type: Automatic with manual winding
Accuracy: +10 / -5 seconds per day
Frequency: 28,800 A/h (8 beats per second)
Power reserve: Approx. 72 hours
Jewels: 35
Functions: Stop seconds, date

CASE
Material: Stainless steel (steel bezel with ceramic insert)
Diameter: 42.6 mm
Thickness: 14.1 mm
Lug to lug: 49.3 mm
Lug width: 20 mm
Water resistance: 300 m (1000 feet)
Magnetic resistance: 4,800 A/m
Bezel: Unidirectional rotating
Crown: Screw-down
Case back: Screw-down with engravings

GLASS
Dual-curved sapphire crystal with internal anti-reflective coating

DIAL
Indexes, hands and bezel with LumiBrite

BRACELET
Clasp: Triple folding clasp with push-button release, solid and slide adjuster

ADDITIONAL FEATURES
Limited edition with engraved serial number on the case back

Note: the orientation of the case back on the actual product may differ from that shown in the photograph