Seiko Prospex Limited Edition SPB439J1

Seiko Prospex Limited Edition SPB439J1

The mission of Seiko Prospex is to protect the world’s oceans now and for future generations, and to secure this legacy for divers everywhere. To this end, Seiko Prospex supports various marine conservation activities through its "Save the Ocean" initiative.
Today, Seiko Prospex introduces a new limited-edition diver’s watch GMT into the Save the Ocean series, which represents these conservation activities.

The new creation’s textured dial captures the power of the polar glaciers that shape the landscapes and seascapes of the Arctic and Antarctic. Accented by a light-blue GMT hand, the dial’s silvery-white hue and delicately striated surface create a unique depth that invites repeated looks.
1968' Diver's Re-interpretation GMT Save the Ocean
Limited edition of 1,500 pieces


Caliber Number 6R54
Movement Type Automatic with manual winding
Precision +25 to -15 seconds per day
Power reserve Approx. 72 hours
Jewels 24
  • 24 jewels
  • Stop second hand function
  • Date display


Case Material Stainless steel (Bezel: Stainless steel with ceramic display)
Case Size
  • Thickness: 12.9mm
  • Diameter: 42.0mm
  • Lug-to-lug: 48.6mm
Crystal Sapphire crystal
Crystal Coating Anti-reflective coating on inner surface
LumiBrite LumiBrite on hands, index(es) and bezel
Distance between lugs 20mm

Other Details

Weight 177.0g
  • LIMITED EDITION on the case back
  • Serial number engraved on the case back
  • Unidirectional rotating bezel
  • Screw-down crown
  • Three-fold clasp with secure lock
  • Screw case back