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STOCK 2068 · SPB383J1

SEIKO Prospex Black Automatic GMT SPB383J1

1 100 €

Original retail price (2023): 1 700 € 600 € below the original retail price

Factory-new, never worn. Checked by hand in six steps.

Availability: 1 in stock

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  • Authenticity guaranteed
  • Secure checkout via Stripe
  • 14-day returns
  • Free worldwide shipping over 500 €

Delivery: insured, tracked shipping worldwide.

1,500+ watches sold on eBay, Catawiki and to private clients. Reviews

Condition and what’s included

Stock cardNO. 2068
Condition
New old stock: factory-new, never sold or worn.
Wear
NOS means unworn with no case wear. Every flaw is described.
Included
Listed for this watch in the description.
Checked
By hand, in six steps, before it was listed.
Returns
14 days. If a watch doesn’t match its description, we make it right.

No wear. No second owner. Just a watch exactly as it left the factory.

From our About page

Brand new Seiko Prospex GMT SPB383J1 powered by Seiko’s in-house Caliber 6R54 automatic movement with 72-hour power reserve. 42mm stainless steel case, sapphire crystal, and 200m water resistance. A versatile professional-grade GMT designed for travel and daily wear.

The Seiko Prospex SPB383J1 Automatic GMT is part of Seiko’s modern Prospex collection, combining professional dive-watch specifications with practical GMT functionality.

Drawing inspiration from Seiko’s heritage in robust tool watches, the SPB383J1 features a 42mm stainless steel case and a unidirectional rotating bezel, paired with a clean black dial designed for maximum legibility. The strong contrast between the hands, markers, and dial ensures excellent visibility in various lighting conditions.

Inside, the watch is powered by Seiko’s in-house Caliber 6R54 automatic movement, offering GMT functionality and approximately 72 hours of power reserve. The independent GMT hand allows tracking of a second time zone, making it an ideal companion for travel.

Protected by a sapphire crystal and offering 200 meters of water resistance, the SPB383J1 stays true to the Prospex philosophy: dependable performance with everyday wearability.

The stainless steel bracelet completes the balanced, versatile design suitable for both professional and casual settings.

Key Specifications:

  • Reference: SPB383J1

  • Movement: Automatic (Seiko Caliber 6R54, GMT function)

  • Case Size: 42mm

  • Case Material: Stainless Steel

  • Crystal: Sapphire

  • Water Resistance: 200m

  • Bracelet: Stainless Steel

  • Condition: Brand New

All watches are inspected prior to shipping.

Checked by hand in six steps.

Every watch is checked by hand before it is listed. This one went through all six. How we authenticate

  1. Physical inspection

    In hand, under magnification: case, lugs, crown and caseback.

  2. Dial and hands

    Under a loupe for printing, fonts, lacquer and originality.

  3. Movement

    Caseback opened where possible, calibre matched to the model.

  4. Reference

    Cross-checked against catalogues, collector databases and known-good examples.

  5. Condition grading

    NOS means unworn with no case wear. Every flaw is described.

  6. Documentation

    Case, dial, movement, clasp and what is included, all in the listing.

Before and after you buy

The quiet part of a good purchase.

Free worldwide shipping over 500 €

Insured, tracked shipping worldwide.

14-day returns

If a watch doesn’t match its description, we make it right.

Secure checkout via Stripe

Pay by card, Apple Pay or Google Pay.

Real people

We answer every question personally, before and after the sale. We’re real people and we reply fast.

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