Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Finding alternatives to

Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition

Ref. spb297j1

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

Case
40.5mm
Movement
Automatic
Category
Diver
MSRP
$1,250
Microbrand picks· 104

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

Astor + Banks Tobacco — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Astor + Banks
Tobacco
40mm · Automatic$1,149
Pro diver · Automatic
Baltic Aquascaphe Titanium — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Baltic
Aquascaphe Titanium
41mm · Automatic$788
Pro diver · Automatic
Borealis Watch Co. Estoril 300 GMT — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Borealis Watch Co.
Estoril 300 GMT
41.50mm · Automatic$600
Pro diver · Automatic
Borealis Watch Co. Neptuno — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Borealis Watch Co.
Neptuno
40.00mm · Automatic$390
Pro diver · Automatic
Borealis Watch Co. Sea Storm MK2 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Borealis Watch Co.
Sea Storm MK2
41.50mm · Automatic$475
Pro diver · Automatic
Borealis Watch Co. Sea Storm MK2 GMT — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Borealis Watch Co.
Sea Storm MK2 GMT
41.50mm · Automatic$415
Pro diver · Automatic
CWC 1980 RN Divers Automatic Re-Issue Watch — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
CWC
1980 RN Divers Automatic Re-Issue Watch
41mm · Automatic$2,458
Pro diver · Automatic
CWC Arctic Radar Automatic Diver Watch — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
CWC
Arctic Radar Automatic Diver Watch
41mm · Automatic$1,333
Pro diver · Automatic
CWC Automatic Divers Watch Mk.2 Black — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
CWC
Automatic Divers Watch Mk.2 Black
41mm · Automatic$1,249
Pro diver · Automatic
CWC Automatic Divers Watch Mk.2 Black with Date — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
CWC
Automatic Divers Watch Mk.2 Black with Date
41mm · Automatic$1,249
Pro diver · Automatic
Phoibos Depth Hunter — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Phoibos
Depth Hunter
40mm · Automatic$470
Pro diver · Automatic
Phoibos Depth Hunter Dlc — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Phoibos
Depth Hunter Dlc
40mm · Automatic$500
Pro diver · Automatic
Fortis Amber Orange — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Fortis
Amber Orange
40mm · Automatic$3,520
Pro diver · Automatic
Phoibos Apollo Titanium — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Phoibos
Apollo Titanium
41mm · Automatic$575
Pro diver · Automatic
Formex Reef 39.5 mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Formex
Reef 39.5 mm
39.5mm · Automatic$2,230
Pro diver · Automatic
Phoibos Wave Master — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Phoibos
Wave Master
42mm · Automatic$309
Pro diver · Automatic
Spinnaker Aquamarine — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Spinnaker
Aquamarine
40mm · Automatic$650
Pro diver · Automatic
Zelos Diver - Flare — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Zelos
Diver - Flare
40mm · Automatic$529
Pro diver · Automatic
Marloe Watch Company Morar 310 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Marloe Watch Company
Morar 310
42mm · Automatic$697
Pro diver · Automatic
Nodus Sector Deep — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Nodus
Sector Deep
38mm · Automatic$650
Pro diver · Automatic
Nodus Sector Deep - DLC Destro — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Nodus
Sector Deep - DLC Destro
38mm · Automatic$700
Pro diver · Automatic
Nodus Sector Deep Pioneer — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Nodus
Sector Deep Pioneer
38mm · Automatic$675
Pro diver · Automatic
Sternglas Marus 2.0 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Sternglas
Marus 2.0
41mm · Automatic$593
Tool diver · Automatic
Sternglas Merion — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Sternglas
Merion
41mm · Automatic$701
Tool diver · Automatic
Geckota Satin Reef Green — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Geckota
Satin Reef Green
42mm · Automatic$349
Pro diver · Automatic
HELM Komodo — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
HELM
Komodo
40mm · Automatic$295
Pro diver · Automatic
Monta Blue / Aluminum — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Monta
Blue / Aluminum
40mm · Automatic$2,550
Pro diver · Automatic
Spinnaker TIGER EYE — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Spinnaker
TIGER EYE
42mm · Automatic$520
Pro diver · Automatic
Venezianico Nereide Bronzo — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Venezianico
Nereide Bronzo
42mm · Automatic$1,250
Pro diver · Automatic
Venezianico Nereide Titanio — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Venezianico
Nereide Titanio
42mm · Automatic$1,250
Pro diver · Automatic
Formex Reef 42 mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Formex
Reef 42 mm
42mm · Automatic$2,414
Pro diver · Automatic
Geckota Amber Bezel — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Geckota
Amber Bezel
40mm · Automatic$349
Tool diver · Automatic
HELM Khuraburi — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
HELM
Khuraburi
42mm · Automatic$310
Pro diver · Automatic
HELM Miyako — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
HELM
Miyako
40mm · Automatic$375
Tool diver · Automatic
Islander Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Islander
Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311
40mm · Automatic$399
Tool diver · Automatic
Islander Islander Northport Hi-Beat Automatic Dive Watch with Ocean Blue and White Ripple Dial #ISL-195 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Islander
Islander Northport Hi-Beat Automatic Dive Watch with Ocean Blue and White Ripple Dial #ISL-195
40.5mm · Automatic$499
Tool diver · Automatic
Lum-Tec Marine 9 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Lum-Tec
Marine 9
39mm · Automatic$463
Pro diver · Automatic
Yema 39.5mm Automatic — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Yema
39.5mm Automatic
39.5mm · Automatic$1,777
Pro diver · Automatic
Baltic Aquascaphe Classic — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Baltic
Aquascaphe Classic
39mm · Automatic$648
Tool diver · Automatic
HELM Komodo Titanium — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
HELM
Komodo Titanium
40mm · Automatic$350
Pro diver · Automatic
Sternglas Marus — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Sternglas
Marus
42mm · Automatic$485
Tool diver · Automatic
Spinnaker Alligator Green — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Spinnaker
Alligator Green
42mm · Automatic$375
Pro diver · Automatic
Baltic Aquascaphe Bronze — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Baltic
Aquascaphe Bronze
39mm · Automatic$697
Tool diver · Automatic
Dryden Steel 12 Hour 41mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Dryden
Steel 12 Hour 41mm
41mm · Automatic$650
Tool diver · Automatic
Hemel Gallant USAF Edition — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Hemel
Gallant USAF Edition
40mm · Automatic$300
Tool diver · Automatic
Henry Archer Sylva — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Henry Archer
Sylva
40mm · Automatic$4,999
Tool diver · Automatic
Henry Archer Icewake — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Henry Archer
Icewake
40mm · Automatic$4,999
Tool diver · Automatic
Henry Archer Polar White 40mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Henry Archer
Polar White 40mm
40mm · Automatic$4,999
Tool diver · Automatic
Henry Archer Trinity Grey 3-link 40mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Henry Archer
Trinity Grey 3-link 40mm
40mm · Automatic$5,299
Tool diver · Automatic
Islander Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Islander
Islander Greenport 39mm Dive Watch with Black and White Dial #ISL-300
39mm · Automatic$399
Tool diver · Automatic
Islander Islander Hudson "Harpoon Diver" 40mm Watch with Degrading Black Dial #ISL-302 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Islander
Islander Hudson "Harpoon Diver" 40mm Watch with Degrading Black Dial #ISL-302
40mm · Automatic$649
Tool diver · Automatic
Marloe Watch Company Sceptre — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Marloe Watch Company
Sceptre
42mm · Automatic$507
Tool diver · Automatic
Marloe Watch Company Sceptre S2 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Marloe Watch Company
Sceptre S2
42mm · Automatic$507
Tool diver · Automatic
Oblvlo DM Skeleton Dive — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Oblvlo
DM Skeleton Dive
40mm · Automatic$194
Tool diver · Automatic
Vaer Black — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Vaer
Black
39mm · Automatic$679
Tool diver · Automatic
Vaer Standard — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Vaer
Standard
39mm · Automatic$699
Tool diver · Automatic
Venezianico Nereide Ametista — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Venezianico
Nereide Ametista
42mm · Automatic$1,250
Tool diver · Automatic
Venezianico Nereide Aureo 42 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Venezianico
Nereide Aureo 42
42mm · Automatic$1,495
Tool diver · Automatic
Wolbrook Black "Tropic" Rubber Strap 40mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Wolbrook
Black "Tropic" Rubber Strap 40mm
40mm · Automatic$579
Tool diver · Automatic
Wolbrook Black "Tropic" Rubber Strap — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Wolbrook
Black "Tropic" Rubber Strap
40mm · Automatic$539
Tool diver · Automatic
Yema Black — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Yema
Black
39.5mm · Automatic$990
Tool diver · Automatic
Zelos Diver - Forged Carbon — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Zelos
Diver - Forged Carbon
40mm · Automatic$749
Tool diver · Automatic
Zelos SS - Coal — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Zelos
SS - Coal
40mm · Automatic$399
Tool diver · Automatic
Baltic Aquascaphe Dual-Crown — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Baltic
Aquascaphe Dual-Crown
39mm · Automatic$724
Tool diver · Automatic
Fortis Amber Orange — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Fortis
Amber Orange
44mm · Automatic$5,120
Pro diver · Automatic
Fortis Black Resin — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Fortis
Black Resin
44mm · Automatic$5,450
Pro diver · Automatic
KUOE SOMBRERO 90-011 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
KUOE
SOMBRERO 90-011
38mm · Automatic$980
Tool diver · Automatic
Dan Henry Orange — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Dan Henry
Orange
40mm · Automatic$310
Tool diver · Automatic
Halios Sunburst Blue — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Halios
Sunburst Blue
40mm · Automatic$765
Tool diver · Automatic
Monta Black — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Monta
Black
40mm · Automatic$1,850
Tool diver · Automatic
Spinnaker Moss Green — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Spinnaker
Moss Green
42mm · Automatic$350
Tool diver · Automatic
Yema Gilt Black — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Yema
Gilt Black
39mm · Automatic$1,699
Pro diver · Automatic
Yema 39mm Automatic — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Yema
39mm Automatic
39mm · Automatic$1,004
Pro diver · Automatic
Galo Super200 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Galo
Super200
39mm · Automatic$488
Tool diver · Automatic
Galo Super200 Dark Edition — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Galo
Super200 Dark Edition
39mm · Automatic$488
Tool diver · Automatic
Helgray Poseidon Diver (Automatic) — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Helgray
Poseidon Diver (Automatic)
40mm · $249
Pro diver · Same size
Lorier Standard — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Lorier
Standard
39mm · Automatic$699
Tool diver · Automatic
Lorier Standard — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Lorier
Standard
39mm · Automatic$699
Tool diver · Automatic
Lorier Skyward — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Lorier
Skyward
39mm · Automatic$599
Tool diver · Automatic
Lorier Standard — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Lorier
Standard
39mm · Automatic$599
Tool diver · Automatic
Vaer Anacapa — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Vaer
Anacapa
39mm · Automatic$699
Tool diver · Automatic
Zelos SS - Teal Meteorite — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Zelos
SS - Teal Meteorite
41mm · Automatic$499
Tool diver · Automatic
Christopher Ward C65 Super Compressor Elite — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Christopher Ward
C65 Super Compressor Elite
40mm · Automatic$1,995
Automatic · Same size
Geckota Ice White — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Geckota
Ice White
38.5mm · Automatic$375
Tool diver · Automatic
Maen SHW.01 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Maen
SHW.01
38mm · Automatic$503
Pro diver · Automatic
Maen M1.1.5 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Maen
M1.1.5
38mm · Automatic$719
Pro diver · Automatic
William Wood Standard — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
William Wood
Standard
41mm · Automatic$1,495
Automatic · Same size
Farer AQUA COMPRESSOR TITANIUM SERIES III — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Farer
AQUA COMPRESSOR TITANIUM SERIES III
41.5mm · $1,350
Pro diver · Same size
William Wood Yellow — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
William Wood
Yellow
39mm · Automatic$920
Automatic · Similar size
Wolbrook Camel Rally Leather Strap — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Wolbrook
Camel Rally Leather Strap
40mm · Automatic$510
Automatic · Same size
Wolbrook Green Rubber Strap — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Wolbrook
Green Rubber Strap
40mm · Automatic$453
Automatic · Same size
Praesidus Blue Tropic Rubber 38mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Praesidus
Blue Tropic Rubber 38mm
38mm · Automatic$645
Tool diver · Automatic
Dan Henry White / Tropic 39mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Dan Henry
White / Tropic 39mm
39mm · Automatic$310
Automatic · Similar size
William Wood Standard — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
William Wood
Standard
41mm · Automatic$995
Automatic · Same size
William Wood Standard — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
William Wood
Standard
41mm · Automatic$995
Automatic · Same size
Nodus Sector II Dive GMT — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Nodus
Sector II Dive GMT
38mm · Automatic$575
Automatic · Sapphire
Praesidus Patina — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Praesidus
Patina
44mm · Automatic$550
Tool diver · Automatic
Ikepod Seapod Bronze Archi — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Ikepod
Seapod Bronze Archi
46mm · Automatic$2,808
Tool diver · Automatic
Ikepod Seapod S001 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Ikepod
Seapod S001
46mm · Automatic$1,458
Tool diver · Automatic
Ikepod Seapod S003 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Ikepod
Seapod S003
46mm · Automatic$1,566
Tool diver · Automatic
Ikepod Seapod S007 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Ikepod
Seapod S007
46mm · Automatic$1,458
Tool diver · Automatic
Cincinnati Watch Company Desk Diver Professional Dive Watch Black & Orange — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Cincinnati Watch Company
Desk Diver Professional Dive Watch Black & Orange
38mm · Manual$750
Tool diver · Sapphire
Farer AQUAMATIC — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Farer
AQUAMATIC
38.5mm · $875
Tool diver · Similar size
Lum-Tec Date — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Lum-Tec
Date
44mm · Automatic$999
Tool diver · Automatic
Steps up from here· 19

Where the same idea goes when budget isn't the constraint.

Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation
39.5mm · Automatic$2,800
Pro diver · Automatic
Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch
39.5mm · Automatic$2,800
Pro diver · Automatic
Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition
44mm · Automatic$3,300
Same family (Prospex Sea) · Pro diver
Bremont Blue / Green 40mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Bremont
Blue / Green 40mm
40mm · Automatic$3,900
Pro diver · Automatic
Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch
42.6mm · Automatic$3,600
Pro diver · Automatic
Bremont Green 40mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Bremont
Green 40mm
40mm · Automatic$3,550
Pro diver · Automatic
Longines LEGEND DIVER — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Longines
LEGEND DIVER
39mm · Automatic$3,850
Pro diver · Automatic
Bremont RNLI Orange — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Bremont
RNLI Orange
40mm · Automatic$3,795
Pro diver · Automatic
Longines LEGEND DIVER 59 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Longines
LEGEND DIVER 59
42mm · Automatic$4,100
Pro diver · Automatic
DOXA SUB 300 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 300
42.5mm · Automatic$2,890
Pro diver · Automatic
DOXA SUB 300 Carbon — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 300 Carbon
42.5mm · Automatic$4,390
Pro diver · Automatic
Bremont Black 43mm — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Bremont
Black 43mm
43mm · Automatic$5,100
Pro diver · Automatic
DOXA SUB 250T GMT — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 250T GMT
40mm · Automatic$2,790
Tool diver · Automatic
DOXA SUB 200 C-GRAPH II — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 200 C-GRAPH II
42mm · Automatic$2,890
Tool diver · Automatic
Grand Seiko SBGE253 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Grand Seiko
SBGE253
40.5mm · Spring Drive$6,900
Tool diver · Same size
Grand Seiko SBGH289 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Grand Seiko
SBGH289
43.8mm · Automatic$7,700
Tool diver · Automatic
Grand Seiko SBGJ237 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Grand Seiko
SBGJ237
44.2mm · Automatic$7,600
Tool diver · Automatic
Marathon Anthracite Black on Rubber Strap — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Marathon
Anthracite Black on Rubber Strap
46mm · Automatic$3,250
Pro diver · Automatic
Grand Seiko SBGE277 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Grand Seiko
SBGE277
44mm · Spring Drive$6,800
Tool diver · Sapphire
In the same price band· 19

Comparable watches at roughly the same money. Often the deciding click for a new buyer.

Seiko Prospex Sea — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea
41mm · Automatic$900
Shared caliber (6R35) · Same family (Prospex Sea)
Seiko 62MAS — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
62MAS
40.5mm · Automatic$1,200
Shared caliber (6R35) · Same family (Prospex Sea)
Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
42.7mm · Automatic$1,350
Shared caliber (6R35) · Same family (Prospex Sea)
Seiko Prospex Sea — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea
41.3mm · Automatic$1,100
Related caliber family · Same family (Prospex Sea)
Tissot Seastar 1000 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Tissot
Seastar 1000
40mm · Automatic$875
Pro diver · Automatic
Tissot Seastar Wilson WNBA — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Tissot
Seastar Wilson WNBA
40mm · Automatic$875
Pro diver · Automatic
Marathon Anthracite Black — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Marathon
Anthracite Black
41mm · Automatic$2,100
Pro diver · Automatic
Marathon OD Green — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Marathon
OD Green
41mm · Automatic$2,100
Pro diver · Automatic
Marathon OD Green — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Marathon
OD Green
41mm · Automatic$1,650
Pro diver · Automatic
Marathon Arctic White on Rubber Strap — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Marathon
Arctic White on Rubber Strap
41mm · Automatic$1,800
Pro diver · Automatic
Citizen Promaster Fujitsubo — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Citizen
Promaster Fujitsubo
41mm · Automatic$1,195
Pro diver · Automatic
DOXA SUB 600T — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 600T
40mm · $1,650
Pro diver · Same size
DOXA DOXA Army — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
DOXA
DOXA Army
42.5mm · $2,490
Pro diver · Similar size
DOXA SUB 300T — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 300T
42.5mm · $2,190
Pro diver · Similar size
Tissot Seastar 1000 Powermatic 80 GMT — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Tissot
Seastar 1000 Powermatic 80 GMT
46mm · Automatic$1,375
Pro diver · Automatic
Tissot Seastar 2000 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Tissot
Seastar 2000
46mm · Automatic$1,275
Pro diver · Automatic
DOXA SUB 200 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 200
42mm · $1,290
Tool diver · Similar size
Hamilton Khaki Navy Frogman Auto — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Hamilton
Khaki Navy Frogman Auto
41mm · Automatic$1,395
Automatic · Same size
Hamilton Khaki Navy Scuba Auto — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Hamilton
Khaki Navy Scuba Auto
40mm · Automatic$975
Automatic · Same size
Cheaper alternatives· 4

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 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea
41.7mm · Automatic$595
Same family (Prospex Sea) · Pro diver
Seiko Monster — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Monster
42.4mm · Automatic$550
Same family (Prospex Sea) · Pro diver
Seiko Prospex Sea Save the Ocean Special Edition — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea Save the Ocean Special Edition
42.4mm · Automatic$550
Same family (Prospex Sea) · Pro diver
Citizen Promaster Diver Automatic — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Citizen
Promaster Diver Automatic
44mm · Automatic$469
Pro diver · Automatic
Direct homages· 6

Watches that wear the same design language — close enough that a stranger might confuse them across the room.

Seiko Prospex Sea — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea
42mm · Automatic0
Related caliber family · Same family (Prospex Sea)
Pagani Design PD-1719 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Pagani Design
PD-1719
42.5mm · Automatic$154
Pro diver · Automatic
Pagani Design PD-1694 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Pagani Design
PD-1694
40mm · Automatic$150
Tool diver · Automatic
Pagani Design PD-1722 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Pagani Design
PD-1722
41mm · Automatic$128
Tool diver · Automatic
Pagani Design PD-1755 — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
Pagani Design
PD-1755
40mm · Automatic$146
Tool diver · Automatic
DOXA SUB 200 T.GRAPH — alternative to Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 200 T.GRAPH
43mm · Automatic0
Tool diver · Automatic
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