Seiko - Prospex SPB121



Product Details

From the Prospex Collection. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line follows every challenge with technological excellence and style.


A modern re-imagining of Seiko's first sport watch, introduced in 1959, this distinctive timepiece is an upgrade of a highly successful Spring 2019 limited edition.


Equipped with a rotating inner compass bezel for outdoor adventure, this unique design features a sunray-finish green dial with gold accents, LumiBrite hands and markers, magnified date window, and sapphire crystal with anti-reflective coating on the inner surface. The 24-jewel automatic movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 70 hours, and can be wound manually or automatically.


Crafted of stainless steel, with brown leather strap, secure tri-fold push button release clasp, screwdown crown and see-through caseback. 20 bar, 200M Water Resistant.

Mechanical Movement

  • 6R35
  • Self-winding mechanism
  • 24 jewels
  • 21,600 semi-oscillations per hour
  • Seconds stop function
  • 70 hour power reserve
  • +25 to -15 seconds per day


  • Stainless steel case with super-hard coating
  • Sapphire crystal with magnifier
  • 200 meters (660 feet), follows ISO standards and is suitable for scuba diving
  • Screw case back
  • Screw-down crown
  • Rotating compass inner ring
  • See-through case back


  • Hours, minutes, seconds
  • Date display

Dial and Hands

  • Green
  • Hour and minute hand coated with luminescent colour
  • Case diameter: 41 mm
  • Band lug width: 20 mm
  • Case thickness: 12.3
  • Lug to Lug: 46.9 mm


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

View More