Seiko Prospex SPB439

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.

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 (dual time display function), Stop seconds hand function

Case/Band
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
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
Weight: 177.0g

Features
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