Prospex SPB381J1 1968 Diver’s Modern Re-interpretation GMT
Description
Movement
Caliber Number: 6R54
Movement Type: Automatic with manual winding
Precision: '+25 to -15 seconds per day
Power Reserve: Approx. 72 hours(3 days)
Jewels: 24
Functions:
- 24-hour hand
- Stop second hand function
Case / Band
Case Material: Stainless steel (super hard coating)
Thickness: 12.9 mm
Diameter: 42 mm
Lug-to-lug: 48.6 mm
Crystal: Sapphire crystal
Crystal Coating: Anti-reflective coating on inner surface
Clasp: Three-fold clasp with secure lock , push button release with extender
Distance Between Lugs: 20
Other Details
Water Resistance: 200m / 660ft diver's
Magnetic Resistance: 4,800 A/m
Features:
- Unidirectional rotating bezel
- Screw-down crown
- Three-fold clasp with secure lock
- Screw case back
- LumiBrite on hands, index(es) and bezel
Any purchase through our SEIKO Online Store has a 3-year guarantee.

