Seiko Luxe Watches 1968 HERITAGE DIVER'S GMT SPB381

The Seiko SPB381 Prospex 1968 Heritage Diver's GMT is a landmark watch — the first mechanical GMT movement ever placed inside a Seiko Prospex diver's watch — and it's available now at Lexor Miami, your authorized Seiko dealer in the USA.

Inspired by Seiko's iconic 1968 diver, the SPB381 honors more than 55 years of dive watch innovation with a bold, modern re-interpretation. The rich hunter-green gradient dial is framed by a Made-in-Japan green ceramic unidirectional bezel with a knurled edge for easy operation underwater. A striking gold GMT hand overlays a green 24-hour inner flange, allowing you to track a second time zone at a glance — without interrupting the main time display.

At the heart of the SPB381 beats the new Caliber 6R54 — Seiko's first mechanical GMT movement in the Prospex line and the longest-running of any Seiko mechanical watch with a 72-hour power reserve. The 42mm stainless steel case with super-hard coating is finished with brushed surfaces and mirror-polished accents, topped by a domed sapphire crystal with anti-reflective coating. With 200 meters of professional diver's water resistance, a screw-down crown and caseback, and large LumiBrite-filled hands and markers for full deep-water legibility, the SPB381 is equally at home at 100 feet below the surface or at 35,000 feet above sea level.

Every Seiko SPB381 purchased at Lexor Miami includes the official 3-year Seiko manufacturer warranty, original box and papers, and free insured shipping across the USA. With over 3,100 five-star Google reviews and 20+ years as an authorized Seiko dealer, Lexor Miami is your trusted source for authentic luxury timepieces in Miami and nationwide. 

Key features

• Seiko's first mechanical GMT in a Prospex diver — a historic milestone for the brand
• Caliber 6R54 automatic movement — 72-hour power reserve (longest of any Seiko mechanical)
• GMT function — independent 24-hour hand sets in 1-hour increments without stopping the time display
• Made-in-Japan green ceramic bezel — unidirectional, 60-minute scale, knurled edge, LumiBrite pearl
• Hunter green gradient dial — gold GMT hand, large LumiBrite hands and applied markers
• 200M professional diver's water resistance — screw-down crown and caseback
• Domed sapphire crystal — anti-reflective coating on inner surface for maximum underwater legibility
• 42mm stainless steel case with super-hard coating — 12.9mm thin, 48.6mm lug-to-lug
• Three-link stainless steel bracelet — secure-lock clasp with diver's extension
• Official 3-year Seiko manufacturer warranty — purchased from authorized US dealer
• Free insured shipping — ships from Miami, FL across the entire USA

Specifications

Brand: Seiko
Collection: Seiko Luxe Prospex Sea
Model reference: SPB381J1
Concept: 1968 Heritage Diver's Modern Re-interpretation GMT
Case diameter: 42 mm
Case thickness: 12.9 mm
Lug-to-lug: 48.6 mm
Lug width: 20 mm
Case material: Stainless steel with super-hard coating
Bezel: Green ceramic, unidirectional, 60-minute elapsed timing scale, LumiBrite pearl
Crystal: Domed sapphire with anti-reflective coating (inner)
Dial color: Hunter green gradient
GMT hand: Gold / yellow-gold finish
24h inner flange: Green
Date position: 4:30
Luminescence: LumiBrite on hands, indices, and bezel pearl
Movement: Caliber 6R54 — automatic with manual winding
Jewels: 24
Power reserve: Approx. 72 hours (3 days)
Frequency: 21,600 vph (3 Hz)
Accuracy: +25 to -15 seconds per day
Functions: Hours, minutes, seconds, date, GMT (independent 24h hand)
Water resistance: 200 m (20 bar) — professional diver-rated
Magnetic resistance: 4,800 A/m
Caseback: Screw-down solid steel caseback
Bracelet: Stainless steel three-link, secure-lock clasp with diver's extension
Watch weight: 176 g
Country of origin: Japan
Warranty: 3-year official Seiko manufacturer warranty

UPC: 029665220264

100% authentic. 3,100+ five-star reviews. Authorized Seiko dealer.
Free insured shipping across the USA. In-store pickup available in Miami, FL.