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Home/Browse/Seiko/Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition
Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition
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Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition

Diver

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition is widely praised for its excellent quality and finishing relative to its price point, featuring a beautiful case, bracelet, and strong Lumibrite lume. Enthusiasts and reviewers highlight the comfortable 42mm case size and the distinctive 4 o'clock crown position. The watch is powered by the in-house 6R54 automatic movement, offering a 72-hour power reserve and rated accuracy of -5/+10 seconds per day, though one source notes the GMT function is secondary. Some find the 4:30 date window divisive, and the bezel clicks are described as quieter than expected. On balance, owners and reviewers rate the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition highly for its refined design and strong value proposition.

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Prospex Sea The Black Series
1 Variant
Lume:LumiBrite on hands, index(es) and bezel
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Retail MSRP
$1,750
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Alternatives
Case
42mm
Power Reserve
72h
Movement
Automatic
Water Resistance
300m
Crystal
Sapphire + AR
01

Case Dimensions

Diameter42mm
Thickness13.3mm
Lug-to-Lug48.6mm
Lug Width20mm
02

Case Build

MaterialStainless Steel
Water Resistance300m
03

Crystal & Dial

CrystalSapphire
AR CoatingAnti-reflective coating on inner surface
LumeLumiBrite on hands, index(es) and bezel
04

Movement

Caliber
6R54
TypeAutomatic
Beat Rate—
Power Reserve72 hours
Jewels24
HackingNo
Hand-WindingNo
ComplicationsTime only
05

Design Language

Dial styleMatte
BezelRotating (dive)
Bracelet / strapLug-attached bracelet
HandsBaton
AI-detected from product image · 5/22/2026
In a nutshell

The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition is an automatic diver watch, with a 42mm stainless steel case, 13.3mm thick, powered by the 6R54 movement and a 72-hour power reserve. Water resistance is rated to 300m, under a sapphire crystal. Manufacturer MSRP is $1,750.

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