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 $2,000·Chronograph under $5,000·Sport under $5,000·GMT under $5,000·Field under $500·Pilot under $2,000·Casual under $1,000All 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.
Get the app
Download on theApp StoreGET IT ONGoogle Play
TermsPrivacyCopyrightDisclosuresContactContribute

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

© 2026 Lug2Lug LLC · Prices are estimates and not offers

Browse/Alternatives/Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Finding alternatives to

Alternatives to the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition

48 watches that match on case size, movement family, and price band. Sorted by how close the match is.

Case
40mm
Movement
Automatic
Category
Diver
MSRP
$1,400
The short answer

The closest alternative to the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition is the Seiko Prospex Sea 1965 Heritage Diver's Watch PADI Special Edition ($1,550) — shared caliber (Seiko 6R55) and Same family (Prospex Sea). If price is the constraint, the Seiko Prospex Sea covers most of the same brief. From the independents, the Zelos Swordfish 3 is the standout microbrand take — common cross-shop and Pro diver. Stepping up, the DOXA SUB 300 ($2,890) is where the same idea goes with a bigger budget.

48 matches

Microbrand picks· 12

Independent makers covering the same brief — usually with something the mainstream brands don't.

Zelos Swordfish 3
Zelosmicro

Swordfish 3

28 variants · Swordfish
40/42mm·Automatic·200m WR
$399MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Formex Reef 39.5 mm
Formexmicro

Reef 39.5 mm

7 variants
39.5mm·Automatic·300m WR
$2,230MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Henry Archer Nordsø
Henry Archermicro

Nordsø

33 variants
40mm·Automatic·200m WR
$521MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Zelos Mako 4
Zelosmicro

Mako 4

22 variants · Mako
40mm·Automatic·300m WR
$529MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Zelos Blacktip 200m Ti
Zelosmicro

Blacktip 200m Ti

5 variants · Blacktip
41mm·Automatic·200m WR
$599MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Boldr Odyssey 40mm
Boldrmicro

Odyssey 40mm

9 variants
40mm·Automatic·300m WR
$799MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Henry Archer Tidevand
Henry Archermicro

Tidevand

20 variants · Ref. HAC-TDV-DCS-3LI
40mm·Automatic·200m WR
$652MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
BERNY BERNY-Men Automatic Compressor-style Diver Watch V4-AM181MS
BERNYmicro

BERNY-Men Automatic Compressor-style Diver Watch V4-AM181MS

5 variants
42mm·Automatic·200m WR
$156MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Geckota Sea-Hunter Dive Watch
Geckotamicro

Sea-Hunter Dive Watch

6 variants · Sea-Hunter
40mm·Automatic·200m WR
$349MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Phoibos Voyager
Phoibosmicro

Voyager

3 variants
39mm·Automatic·200m WR
$299MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Henry Archer Vesterhav
Henry Archermicro

Vesterhav

29 variants
40mm·Automatic·200m WR
$599MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
BERNY BERNY-Men Automatic Compressor-style Diver Watch V5-AM539M
BERNYmicro

BERNY-Men Automatic Compressor-style Diver Watch V5-AM539M

6 variants
42mm·Automatic·200m WR
$140MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition

Mainstream picks· 12

Established brands covering the same brief at a comparable price — same case size, similar movement family. Often the deciding click for a new buyer.

Seiko Prospex Sea 1965 Heritage Diver's Watch PADI Special Edition
Seiko

Prospex Sea 1965 Heritage Diver's Watch PADI Special Edition

 
40mm·Automatic·300m WR
$1,550MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Seiko Prospex Sea 1965 Heritage Diver's Watch
Seiko

Prospex Sea 1965 Heritage Diver's Watch

2 variants · Prospex Sea
40mm·Automatic·300m WR
$1,300MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Seiko Prospex Sea Seiko Diver’s Watch 60th Anniversary Limited Edition
Seiko

Prospex Sea Seiko Diver’s Watch 60th Anniversary Limited Edition

 
40mm·Automatic·300m WR
$1,400MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Tissot Seastar 1000
Tissot

Seastar 1000

7 variants
40/43mm·Automatic·300m WR
$875MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Christopher Ward C60 Atoll 300
Christopher Ward
Atoll

C60 Atoll 300

2 variants · Atoll
40mm·Automatic·300m WR
$1,320MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Hamilton Khaki Navy Scuba Auto
Hamilton

Khaki Navy Scuba Auto

4 variants
40/43mm·Automatic·100m WR
$975MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Christopher Ward C60 Trident Reef
Christopher Ward
Trident

C60 Trident Reef

5 variants · Trident
41mm·Automatic·200m WR
$995MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
DOXA SUB 250T GMT
DOXA

SUB 250T GMT

9 variants
40mm·Automatic·250m WR
$2,790MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Citizen Promaster Fujitsubo
Citizen
Promaster DiverPromaster

Promaster Fujitsubo

Ref. NB6026
41mm·Automatic·200m WR
$1,195MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Yema Navygraf Pearl CMM.20
Yema

Navygraf Pearl CMM.20

2 variants · Navygraf
39mm·Automatic·100m WR
$1,862MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Tissot Seastar 2000
Tissot

Seastar 2000

 
46mm·Automatic·600m WR
$1,275MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Glycine Combat Sub Sport
Glycine

Combat Sub Sport

8 variants · Ref. GL0487
42mm·Automatic·200m WR
$1,650MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition

Cheaper alternatives· 12

If the price is the only thing keeping you off this watch, these get you most of the way there for less.

Seiko Prospex Sea
Seiko

Prospex Sea

2 variants
42mm·Automatic·300m WR
—MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Seiko Prospex Sea PADI Special Edition
Seiko

Prospex Sea PADI Special Edition

 
41.7mm·Automatic·200m WR
$650MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Seiko Prospex Sea
Seiko

Prospex Sea

4 variants
41.7mm·Automatic·200m WR
$595MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Orient Mako-3 AA08 Diver Watch
Orient
DiverMako

Mako-3 AA08 Diver Watch

4 variants · Mako
41.8mm·Automatic·200m WR
$375MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Orient 75th Anniversary RA-AC0Q12L30B
Orient

75th Anniversary RA-AC0Q12L30B

 
39.9mm·Automatic·200m WR
$405MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Orient AA08 Diver Watch
Orient
DiverAA08

AA08 Diver Watch

4 variants · AA08
41.8mm·Automatic·200m WR
$390MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Yema Pearldiver
Yema

Pearldiver

 
38mm·Automatic·100m WR
$491MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Bulova Black Dial Stainless Steel Bracelet Vintage Sea Hunter 43B175
Bulova
Vintage Sea Hunter

Black Dial Stainless Steel Bracelet Vintage Sea Hunter 43B175

5 variants
39mm·Automatic·200m WR
$395MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Citizen Tsuyosa Shore
Citizen

Tsuyosa Shore

2 variants · Tsuyosa
40mm·Automatic·100m WR
$495MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Citizen Promaster Diver Automatic
Citizen

Promaster Diver Automatic

3 variants · Promaster
44mm·Automatic·200m WR
$469MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Invicta Pro Diver 8927OB
Invictamicro

Pro Diver 8927OB

7 variants
40mm·Automatic·200m WR
—MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Glycine Unisex Combat Sub Bronze 39mm Automatic Watch GL0517
Glycine

Unisex Combat Sub Bronze 39mm Automatic Watch GL0517

8 variants
39mm·Automatic·300m WR
$1,550MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition

Pricier alternatives· 12

Where the same idea goes when budget isn't the constraint — luxury upgrades and step-ups.

DOXA SUB 300
DOXA

SUB 300

8 variants
42.5mm·Automatic·300m WR
$2,890MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Norqain Adventure 40mm
Norqain

Adventure 40mm

2 variants
40mm·Automatic·200m WR
$4,283MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
DOXA SUB 200 C-GRAPH II
DOXA

SUB 200 C-GRAPH II

6 variants
42mm·Automatic·200m WR
$2,890MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition
Seiko

Prospex Sea 1970 Heritage Diver's Black Series Limited Edition

 
44mm·Automatic·200m WR
$3,300MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Fortis Marinemaster M-40
Fortis

Marinemaster M-40

8 variants · Marinemaster
40mm·Automatic·300m WR
$3,520MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch
Seiko

Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

 
42.6mm·Automatic·300m WR
$3,600MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Seiko Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition
Seiko

Prospex Marinemaster Marinemaster 1968 Heritage JAMSTEC Limited Edition

 
42.6mm·Automatic·300m WR
$3,900MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Omega Seamaster 300 Co Axial Master Chronometer 41mm
Omega

Seamaster 300 Co Axial Master Chronometer 41mm

3 variants · Seamaster
41mm·Automatic·300m WR
$8,000MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Omega Seamaster Diver 300M Co Axial Master Chronometer 42mm
Omega

Seamaster Diver 300M Co Axial Master Chronometer 42mm

25 variants · Seamaster Diver 300M
42mm·Automatic·300m WR
$6,300MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Fortis Flieger F-41
Fortis

Flieger F-41

4 variants · Ref. F-41
41mm·Automatic·200m WR
$2,530MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Breitling Superocean Heritage B31 Automatic
Breitling

Superocean Heritage B31 Automatic

7 variants · Superocean Heritage
40/42/44mm·Automatic·200m WR
$6,500MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
Longines LEGEND DIVER 59
Longines

LEGEND DIVER 59

Ref. L3.795.4.59.9
42mm·Automatic·300m WR
$4,100MSRP
vsCompare with the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited Edition
← Back to the Seiko Prospex Sea Seiko Prospex 1965 Heritage Diver’s Watch Save the Ocean Limited EditionBest Diver Watches Under $2,000 →Open the alternatives engine