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Seiko Prospex x Automatic ft. 1968 Heritage Modern Re-Interpretation aka Marinemaster GMT Men Diver Round 300m Water Resistant Watch HBC002J1 HBC002 HBC-002 HBC-002J1
Conquer land and sea with the Seiko Prospex HBC001, a 1968 Heritage GMT diver featuring a black dial and ceramic bezel. Powered by the automatic Caliber 6R54 with a 72-hour reserve, it boasts 300m water resistance, a new tool‑free micro‑adjust clasp, and Lumibrite for low‑light visibility.
Caliber Number / Movement
6R54 (automatic with manual winding capacity)
Power Reserve / Accuracy
Approximately 72 hours (+25 to -15 seconds per day)
Case / Band Material
Stainless steel case, ceramic bezel insert with stainless steel band (three-fold clasp with secure lock, push-button release with slide extender)
Water Resistance
300m / 1,000ft diver
Case Size
Thickness: 13.3 mm
Diameter: 42.0 mm
Length: 48.6 mm
Lug width: 20.0 mm
Other Specifications
Seiko Prospex x Automatic ft. 1968 Heritage Modern Re-Interpretation aka Marinemaster GMT
Made in Japan
Magnetic resistance (4,800 A/m)
Unidirectional rotating bezel
Screw-down crown
Screw case back
24 jewels
Date and 24-hour (GMT dual time) display
Stop second hand function (hacking mechanism)
Regular timekeeping (analog display)
