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There are just 1,500 pieces of this limited edition 1968 Seiko mechanical diver’s re-interpretation available worldwide.
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.
A proportion of proceeds from this timepiece will be given back to the PADI® and PADI Aware Foundation’s Marine Debris Program to rid the ocean of marine debris.
This piece is powered by the 6R54 movement, which is the first Seiko Prospex Diver’s mechanical GMT movement to have GMT functionality and a long three-day power reserve. The GMT functionality allows the wearer to track multiple time zones at once. The rotating bezel of this piece is made from high quality scratch-resistant Japanese ceramic whilst its low centre of gravity and short-pitch bracelet have been designed for a comfortable fit.
Prospex is a combination of the words ‘Professional’ and ‘Specifications.’ Seiko Prospex timepieces are designed to be practical, reliable and durable; to meet the high standards required in extreme environments for sports lovers and adventure seekers alike.
The words “Limited Edition” and the watch’s individual number are inscribed on the screw-down case back.*
- In the actual product, the case back direction may vary from the photographed version.




























Seiko Prospex Sea Arctic Ocean GMT Limited Edition Silver Dial Silver Steel Strap Watch For Men - SPB439J1
Excellent!
Based on 4.8/5 of 992+ reviews
19-03-2025
Really Great Watch
I picked up a Seiko for daily use and I’m seriously impressed. Keeps perfect time, looks clean, and feels durable. You can tell it’s built to last.
- Carmen W
09-03-2025
Feels Super Legit
Was nervous buying a Versace online but this one’s 100% real. It has a nice weight, and the face is stunning. I get compliments every time I wear it.
– Kaia S
15-01-2025
Stylish Look
My Tag Heuer arrived in two days—didn’t expect that! The watch is absolutely stunning. Best quality and came well-packaged.
– Delia H
23-05-2025
Fully Authentic
The Seiko came with all original docs and tags. I had it checked and it’s 100% real. Very happy with the quality and service. Definitely, I'll order again.
– Sophie W
11-04-2025
Truly Impressed
I have a few branded watches, but this one instantly became my favorite. The detail on the dial is insane. Delivery was smooth and fast.
– Matteo R
21-03-2025
Amazing Deal
Scored a gorgeous Gucci piece for way less than retail. Brand new, boxed, and certified. Will recommend this store to my friends for sure.
– Zane F
08-02-2025
Rare Find
I’ve been looking for this Seiko model for months and finally found it here. So glad I took the chance totally legit and beautiful. Came in a really cute box too.