Seiko Prospex SPB321J1

Seiko Prospex SPB321J1

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Seiko Prospex King SUMO SPB321J1


  • Caliber Number: 6R35

Movement Type

  • Automatic with manual winding
  • Precision: +25 to -15 seconds per day
  • Power reserve: Approx. 70 hours
  • Jewels 24


  • Stop second hand function
  • Date display


Case Material: Stainless steel (super hard coating)

Case Size: 

  • Thickness:13.4mm
  • Diameter:45.0mm
  • Lug-to-lug:52.6mm

Crystal: Sapphire crystal

Crystal Coating: Anti-reflective coating on inner surface

LumiBrite: LumiBrite on hands, index(es) and bezel

Clasp: Three-fold clasp with secure lock , push button release with extender

Distance between lugs: 20mm

Other Details

Water Resistance: 200m / 660ft diver's

Weight: 190.0


  • Unidirectional rotating bezel
  • Screw-down crown
  • Three-fold clasp with secure lock
  • Screw case back

All our Seiko watches comes with 1 year warranty