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Today, Seiko introduces a new movement in the 6R family with a GMT function and an extended power reserve of 72 hours. The 6R54 calibre is presented in this new Prospex SPB381J1 creation, a modern reinterpretation of the classic 1968 model. The watch is water-resistant to 200 metres, the hands and 12 indexes are equipped with Lumibrite and the unidirectional bezel has a luminous insert. It is presented on a new three-link stainless steel bracelet with a slim profile that provides a solid and comfortable fit on the wrist.
This modern re-interpretation of the 1968 Diver’s watch is inspired by Japan’s first hi-beat one-piece Diver’s watch created by Seiko.
The success of the 1968 model laid the foundation for Seiko Diver’s watch development which for sixty years has innovated in wearable, precise watches for professional and recreational divers.
This modern watch is powered by the new in-house Calibre 6R54 and is the first of Seiko’s diving watches with mechanical GMT functionality. Built for wearability: the bracelet fits comfortably due to its low centre of gravity and short-pitch – and durability: with a three-day power reserve and high-quality scratch resistant Japanese ceramic Diving scale, its water resistance is up to 200m.
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.
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 / Stop second hand function
CASE/BAND
- Case Material: Stainless steel (super hard coating)
- 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: 20mm
OTHER DETAILS
- Water Resistance: 200m / 660ft diver's
- Magnetic Resistance: 4,800 A/m
- Weight: 176.0g
- Features: Unidirectional rotating bezel / Screw-down crown / Three-fold clasp with secure lock / Screw case back
Brand |
Seiko Prospex |
---|---|
Gender |
Men's |
Movement Type |
Automatic Mechanical |
Features |
GMT |
Case Shape |
Round |
Dial Colour |
Black |
Material Type |
Stainless Steel |
Strap Type |
Metal Bracelet |
Water Resistance |
200m |































Seiko Prosprex Dark Depths GMT Automatic Black Dial Silver Steel Strap Watch For Men - SPB383J1
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.