Seiko Prospex SPB237J1

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Seiko Prospex SPB237J1

With contemporary styling and technology, this versatile timepiece reimagines Seiko's famed 1970 diver's watch, complete with the iconic case design that revolutionized underwater safety with a recessed crown creating a built-in crown guard at 4 o'clock.


Caliber Number 6R35
Movement Type Automatic with manual winding
Precision +25 to -15 seconds per day
Power reserve Approx. 70 hours
Jewels 24
  • Stop seconds hand function
  • Date display


Case Material Stainless steel (super hard coating)
Case Size
  • Thickness: 13.2mm
  • Diameter: 42.7mm
  • Lug-to-lug: 46.6mm
Crystal Curved sapphire crystal
Crystal Coating Anti-reflective coating on inner surface
LumiBrite LumiBrite on hands, indexes and bezel
Band Material Polyester
Distance between lugs 20

Other Details

Weight 106.0
  • Screw case back
  • Unidirectional rotating bezel
  • Screw-down crown
  • An additional polyester strap is included