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Browse/Alternatives/Seiko Prospex Sea Save the Ocean Special Edition
Seiko Prospex Sea Save the Ocean Special Edition
Finding alternatives to

Seiko Prospex Sea Save the Ocean Special Edition

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

Case
43.8mm
Movement
Automatic
Category
Diver
MSRP
$650
The short answer

The closest alternative to the Seiko Prospex Sea Save the Ocean Special Edition is the Seiko Prospex Sea PADI Special Edition ($625) — shared caliber (Seiko 4R35) and Same family (Prospex Sea). If price is the constraint, the Orient Kanno at $320 (vs $650 for the Prospex Sea Save the Ocean Special Edition) covers most of the same brief. From the independents, the Zelos Great White 43 is the standout microbrand take — common cross-shop and Pro diver. Stepping up, the Seiko Prospex Sea ($1,500) is where the same idea goes with a bigger budget.

45 matches
Microbrand picks· 12

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

Zelos Great White 43
Zelosmicro

Great White 43

3 variantsGreat White
43mm·Automatic·300m WR
$599MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Zelos Swordfish 3
Zelosmicro

Swordfish 3

40/42mm
28 variantsSwordfish
40/42mm·Automatic·200m WR
$399MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Zelos Hammerhead V3 300m Titanium
Zelosmicro

Hammerhead V3 300m Titanium

10 variantsHammerhead V3
44mm·Automatic·300m WR
$559MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Spinnaker Hass Automatic
Spinnakermicro

Hass Automatic

10 variantsHass
43mm·Automatic·300m WR
$445MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Islander Islander Automatic Dive Watch with Bracelet, Double-Domed AR Sapphire Crystal, and Embossed Ceramic Bezel Insert #ISL-18
Islandermicro
Dive Watches Guide

Islander Automatic Dive Watch with Bracelet, Double-Domed AR Sapphire Crystal, and Embossed Ceramic Bezel Insert #ISL-18

43mm·Automatic·200m WR
$429MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Serket Watch Co Reef X Diver
Serket Watch Comicro

Reef X Diver

11 variantsRef. SWC2024RXSCC0001
43mm·Automatic·200m WR
$499MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Spinnaker Dumas Automatic
Spinnakermicro

Dumas Automatic

11 variantsDumas
44mm·Automatic·300m WR
$239MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Spinnaker Croft Pioneer
Spinnakermicro

Croft Pioneer

8 variantsCroft
42mm·Automatic·100m WR
$199MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Borealis Watch Co. Jamanta
Borealis Watch Co.micro

Jamanta

5 variantsJamanta
42.50mm·Automatic·300m WR
$415MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Filippo Loreti Watches Neptune Automatic
Filippo Loreti Watchesmicro

Neptune Automatic

2 variantsSeries
43mm·Automatic·200m WR
$260MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Dryden Pathfinder
Drydenmicro

Pathfinder

9 variantsPathfinder
41mm·Automatic·201m WR
$650MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Boldr Odyssey 40mm
Boldrmicro

Odyssey 40mm

9 variantsSeries
40mm·Automatic·300m WR
$799MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special 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 PADI Special Edition
Seiko

Prospex Sea PADI Special Edition

43.8mm·Automatic·200m WR
$625MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Seiko Prospex Sea
Seiko

Prospex Sea

2 variantsProspex Sea
43.8mm·Automatic·200m WR
$625MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Seiko Prospex Sea PADI Special Edition
Seiko

Prospex Sea PADI Special Edition

41.7mm·Automatic·200m WR
$650MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Tissot Seastar 1000
Tissot

Seastar 1000

40/43mm
7 variantsSeastar 1000
40/43mm·Automatic·300m WR
$875MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Orient Kamasu
Orient

Kamasu

4 variantsKamasu
41.8mm·Automatic·200m WR
$375MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Tissot Seastar 2000
Tissot

Seastar 2000

46mm·Automatic·600m WR
$1,275MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Citizen Promaster Diver Automatic
Citizen

Promaster Diver Automatic

2 variantsPromaster
44mm·Automatic·200m WR
$469MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Glycine Combat Sub Sport
Glycine

Combat Sub Sport

8 variantsCombat Sub Sport
42mm·Automatic·200m WR
$1,650MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Orient RA-AC0K Diver Watch
Orient
DiverRA AC0K

RA-AC0K Diver Watch

3 variantsRA AC0K
43.4mm·Automatic·200m WR
$455MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Orient AA08 Diver Watch
Orient
DiverAA08

AA08 Diver Watch

4 variantsAA08
41.8mm·Automatic·200m WR
$390MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Hamilton Khaki Navy Scuba Auto
Hamilton

Khaki Navy Scuba Auto

40/43mm
4 variantsKhaki Navy Scuba Auto
40/43mm·Automatic·100m WR
$975MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Christopher Ward C60 Trident Reef
Christopher Ward
Trident

C60 Trident Reef

5 variantsTrident
41mm·Automatic·200m WR
$995MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Cheaper alternatives· 9

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

Orient Kanno
Orient

Kanno

4 variantsKanno
44mm·Automatic·200m WR
$320MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Orient AA02 Diver Watch
Orient
DiverAA02

AA02 Diver Watch

3 variantsAA02
41.5mm·Automatic·200m WR
$285MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Orient Diver Watch
Orient

Diver Watch

7 variantsDiver
41.5mm·Automatic·200m WR
$285MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Seiko DressKX
Seiko
5 Sports SKX series

DressKX

4 variants5 Sports SKX series
40mm·Automatic·100m WR
$315MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Swatch Sistem Lake
Swatch

Sistem Lake

Ref. YIS420
42mm·Automatic
$230MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Seiko 5 Sports Field series
Seiko

5 Sports Field series

36.4/39.4/41mm
16 variants5 Sports Field series
36.4/39.4/41mm·Automatic·100m WR
$315MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Swatch Sistem Sea
Swatch

Sistem Sea

Ref. SUTN403
42mm·Automatic
$170MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Swatch Sistem Slate
Swatch

Sistem Slate

Ref. YIB400
42mm·Automatic
$250MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Seiko 5 Sports SKX series
Seiko

5 Sports SKX series

2 variants5 Sports SKX series
28mm·Automatic·100m WR
$315MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Pricier alternatives· 12

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

Seiko Prospex Sea
Seiko

Prospex Sea

4 variantsProspex Sea
43.5mm·Automatic·200m WR
$1,500MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Seiko Prospex Sea Seiko Diver’s Watch 60th Anniversary Limited Edition
Seiko

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

42mm·Automatic·300m WR
$1,750MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition
Seiko

Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition

42mm·Automatic·300m WR
$1,750MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Glycine Combat Sub Vintage
Glycine

Combat Sub Vintage

2 variantsCombat Sub Vintage
42mm·Automatic·200m WR
$1,750MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Breitling Superocean Automatic
Breitling

Superocean Automatic

36/42/44/46mm
19 variantsSuperocean
36/42/44/46mm·Automatic·300m WR
$5,700MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Tudor Black Bay 68
Tudor

Black Bay 68

Ref. m7943a1a0nu-0001
43mm·Automatic·200m WR
$5,475MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Longines HYDROCONQUEST GMT
Longines

HYDROCONQUEST GMT

5 variantsHydroConquest GMT
43mm·Automatic·300m WR
$3,350MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Fortis Marinemaster M-44
Fortis

Marinemaster M-44

5 variantsMarinemaster
44mm·Automatic·300m WR
$5,120MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Omega Seamaster Planet Ocean 600M Co Axial Master Chronometer 42mm
Omega

Seamaster Planet Ocean 600M Co Axial Master Chronometer 42mm

7 variantsSeamaster Planet Ocean 600M
42mm·Automatic·600m WR
$8,600MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Omega Seamaster Diver 300M Co Axial Master Chronometer 42mm
Omega

Seamaster Diver 300M Co Axial Master Chronometer 42mm

25 variantsSeamaster Diver 300M
42mm·Automatic·300m WR
$6,300MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Grand Seiko SBGH289
Grand Seiko
Sport

SBGH289

43.8mm·Automatic·200m WR
$7,700MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
Glycine Combat Sub Box Ceramic
Glycine

Combat Sub Box Ceramic

3 variantsCombat Sub Box Ceramic
41mm·Automatic·200m WR
$1,800MSRP
—Used
vsCompare with the Seiko Prospex Sea Save the Ocean Special Edition
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