lug2lug
BrowseCompareNewsCommunityMy Watches
BrowseCompareNewsCommunityMy Watches
Theme
Popular microbrands:Christopher Ward·Baltic·anOrdain·Atelier Wen·Boldr·Bremont·Dan Henry·DOXABrowse all →
Best, by the specs:Best dress watches·Diver under $5,000·Chronograph under $5,000·Sport under $5,000·GMT under $5,000·Field under $2,000·Best tool watches·Pilot under $2,000All rankings →
Glossary:Lug-to-Lug·Water Resistance·Chronograph·GMT·Automatic·LumeBrowse all →
Tools:Collection tracker·Wrist-fit calculator·What should I buy?·Value retention rankings·iPhone app
Lug2Letter
Watches worth knowing about, weekly.
Curated discoveries, founder spotlights, and the occasional deep-dive.
Now on iPhone
Download on theApp Store
TermsPrivacyCopyrightDisclosuresContactContribute

Independent reference site · not affiliated with any brand · contains affiliate links

© 2026 Lug2Lug LLC · Prices are estimates and not offers

Loading watch
Home/Browse/Seiko/Prospex Sea 1968 Heritage Diver's GMT
Seiko Prospex Sea 1968 Heritage Diver's GMT
Click to inspect
Ask the communityStart a discussion about the Prospex Sea 1968 Heritage Diver's GMT — get takes from other collectors.Ask →
Seiko · Prospex Sea

Seiko Prospex Sea 1968 Heritage Diver's GMT

Diver

$1,500

Used market ≈ $1,331 · from 10 sold listings

Buy from SeikoFind used on eBay

Case

Diameter
42mm
Thickness
12.9mm
Lug-to-lug
48.6mm
Lug width
20mm
Material
Stainless Steel
Water resistance
200m

Crystal & dial

Crystal
Sapphire
AR coating
Anti-reflective coating on inner surface
Lume
LumiBrite on hands, index(es) and bezel

Movement

Caliber
Seiko 6R54
Type
Automatic
Power reserve
72h
Jewels
24
Hacking
No
Hand-winding
No
Complications
Time only

Design language

Case shape
round
Dial style
matte
Bezel
rotating
Bracelet
lug-attached
Hands
baton

AI-detected from the product image

Prospex Sea collection · 32 watches

62MAS
62MAS40.5mm
Captain Willard
Captain Willard42.7mm
Ice Diver
Ice Diver45mm
King Turtle
King Turtle45mm
Monster
Monster42.4mm
Prospex Sea
Prospex Sea42mm
Prospex Sea
Prospex Sea41mm
Prospex Sea
Prospex Sea43.5mm
Prospex Sea
Prospex Sea41.3mm
Prospex Sea
Prospex Sea43.8mm
Prospex Sea
Prospex Sea41.7mm
Prospex Sea
Prospex Sea34mm
19 more in this collection
Prospex Sea 1965 Heritage Diver's Save the Ocean Special EditionProspex Sea 1965 Heritage Diver's WatchProspex Sea 1965 Heritage Diver's Watch PADI Special EditionProspex Sea 1968 Heritage Diver's GMT WatchProspex Sea 1968 Heritage Diver's GMT Watch Limited EditionProspex Sea 1970 Heritage Diver's Black Series Limited EditionProspex Sea 1970 Heritage Diver's Save the Ocean Special EditionProspex Sea JAWS 50th Anniversary Limited EditionProspex Sea PADI Special EditionProspex Sea PADI Special EditionProspex Sea PADI Special EditionProspex Sea PADI Special EditionProspex Sea Save the Ocean Special EditionProspex Sea Save the Ocean Special EditionProspex Sea Save the Ocean Special EditionProspex Sea Seiko Diver’s Watch 60th Anniversary Limited EditionProspex Sea Seiko Diver’s Watch 60th Anniversary Limited EditionProspex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited EditionProspex Sea The Black Series

2 colorways

Alternatives

01The connection engine

More like this.

Seiko Prospex Sea 1968 Heritage Diver's GMT Watch

Seiko

Prospex Sea 1968 Heritage Diver's GMT Watch

42mm · Automatic$1,700

Seiko Prospex Sea

Seiko

Prospex Sea

42mm · Automatic

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

Seiko

Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition

42mm · Automatic$1,750

Geckota Sea-Hunter Dive Watch

Geckota

Sea-Hunter Dive Watch

40mm · Automatic$349

Henry Archer Nordsø

Henry Archer

Nordsø

40mm · Automatic$521

Spinnaker Croft Pioneer

Spinnaker

Croft Pioneer

42mm · Automatic$199

View all alternatives

02The community take

Owners talk.

“

The Seiko Prospex Sea 1968 Heritage Diver's GMT is widely praised for its build quality, finishing, and comfortable wearability, offering good value for its price point. Owners and reviewers highlight the attractive silver/white sunray dial, blue ceramic bezel, and the premium feel of the improved bracelet clasp with excellent micro-adjustment. The Caliber 6R54 movement provides a 72-hour power reserve, and real-world accuracy often exceeds its stated range of +25 to -15 seconds per day, with some owners reporting figures around +3 to +5 seconds per day. However, the caller-style GMT functionality is a point of contention for some, who find the GMT scale difficult to read and prefer a flyer GMT at this price. Some also find the crown position at 4 o'clock undesirable, and a few note a lack of dial contrast or illegibility of the inner bezel.

Synthesized from 9 sources
A Blog to Watch·3↗
Fratello·2↗
WatchUSeek·2↗
Hodinkee↗
Reddit↗
Open the discussion

On real wrists

No shots yet. Show how it wears.

03The paper trail

04The discussion

Talk about the Seiko Prospex Sea 1968 Heritage Diver's GMT.