Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Finding alternatives to

Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition

Ref. spb301j1

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

Case
42.7mm
Movement
Automatic
Category
Diver
MSRP
$1,350
Most similar· 12

The closest match overall — same case size, similar movement family, comparable price. Often the deciding click for a new buyer.

Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
40.5mm · Automatic$1,250
Shared caliber (6R35) · Same family (Prospex Sea)
Seiko Prospex Sea 1968 Heritage Diver's GMT Watch — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea 1968 Heritage Diver's GMT Watch
42mm · Automatic$1,700
Related caliber family · Same family (Prospex Sea)
Seiko Prospex Sea — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea
41mm · Automatic$900
Shared caliber (6R35) · Same family (Prospex Sea)
Marathon Anthracite Black — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Marathon
Anthracite Black
41mm · Automatic$2,100
Common cross-shop · Pro diver
Marathon OD Green — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Marathon
OD Green
41mm · Automatic$2,100
Common cross-shop · Pro diver
Marathon OD Green — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Marathon
OD Green
41mm · Automatic$1,650
Common cross-shop · Pro diver
Tissot Seastar 1000 — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Tissot
Seastar 1000
40mm · Automatic$875
Common cross-shop · Pro diver
Tissot Seastar Wilson WNBA — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Tissot
Seastar Wilson WNBA
40mm · Automatic$875
Common cross-shop · Pro diver
DOXA DOXA Army — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
DOXA
DOXA Army
42.5mm · $2,490
Common cross-shop · Pro diver
DOXA SUB 300T — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 300T
42.5mm · $2,190
Common cross-shop · Pro diver
Tissot Seastar 1000 Powermatic 80 GMT — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Tissot
Seastar 1000 Powermatic 80 GMT
46mm · Automatic$1,375
Common cross-shop · Pro diver
Citizen Promaster Fujitsubo — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Citizen
Promaster Fujitsubo
41mm · Automatic$1,195
Common cross-shop · Pro diver
Cheaper alternatives· 11

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 Save the Ocean Special Edition — alternative to Seiko Prospex Sea 1970 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
Seiko Prospex Sea PADI Special Edition — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea PADI Special Edition
45mm · Automatic$650
Same family (Prospex Sea) · Pro diver
Seiko Prospex Sea — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Sea
41.7mm · Automatic$595
Same family (Prospex Sea) · Pro diver
Citizen Promaster Diver Automatic — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Citizen
Promaster Diver Automatic
44mm · Automatic$469
Common cross-shop · Pro diver
Orient 75th Anniversary RA-AC0Q12L30B — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Orient
75th Anniversary RA-AC0Q12L30B
39.9mm · Automatic$405
Common cross-shop · Automatic
Orient Kamasu — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Orient
Kamasu
41.8mm · Automatic$375
Common cross-shop · Automatic
Orient Mako-3 AA08 Diver Watch — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Orient
Mako-3 AA08 Diver Watch
41.8mm · Automatic$375
Common cross-shop · Automatic
Citizen Tsuyosa Shore — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Citizen
Tsuyosa Shore
40mm · Automatic$495
Common cross-shop · Automatic
Marathon Black — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Marathon
Black
41mm · Automatic$600
Common cross-shop · Automatic
Citizen Tsuyosa 60 — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Citizen
Tsuyosa 60
40mm · Automatic$431
Common cross-shop · Automatic
Nivada Grenchen Chronoking Mecaquartz — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Nivada Grenchen
Chronoking Mecaquartz
38mm · Mecaquartz Chronograph$610
Sapphire · Visually similar
Pricier alternatives· 12

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

Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition — alternative to Seiko Prospex Sea 1970 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
DOXA SUB 300 — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 300
42.5mm · Automatic$2,890
Common cross-shop · Pro diver
Longines LEGEND DIVER 42 — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Longines
LEGEND DIVER 42
42mm · Automatic$2,850
Pro diver · Automatic
Longines LEGEND DIVER 42 BLACK LACQUERED — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Longines
LEGEND DIVER 42 BLACK LACQUERED
42mm · Automatic$3,200
Pro diver · Automatic
Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Seiko
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch
42.6mm · Automatic$2,900
Pro diver · Automatic
DOXA SUB 300 Carbon — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 300 Carbon
42.5mm · Automatic$4,390
Common cross-shop · Pro diver
Longines LEGEND DIVER BRONZE — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Longines
LEGEND DIVER BRONZE
42mm · Automatic$3,550
Pro diver · Automatic
Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation — alternative to Seiko Prospex Sea 1970 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
DOXA SUB 200 C-GRAPH II — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
DOXA
SUB 200 C-GRAPH II
42mm · Automatic$2,890
Common cross-shop · Tool diver
NOMOS Glashütte Club Sport neomatik 42 date black — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
NOMOS Glashütte
Club Sport neomatik 42 date black
42mm · Automatic$5,050
Pro diver · Automatic
NOMOS Glashütte Tangente Sport neomatik 42 date marine black — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
NOMOS Glashütte
Tangente Sport neomatik 42 date marine black
42mm · Automatic$6,030
Pro diver · Automatic
Bremont Black 43mm — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Bremont
Black 43mm
43mm · Automatic$5,100
Pro diver · Automatic
Looks like this· 9

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

Pagani Design PD-1719 — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Pagani Design
PD-1719
42.5mm · Automatic$154
Common cross-shop · Pro diver
Pagani Design PD-1685 — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Pagani Design
PD-1685
42mm · Automatic$171
Common cross-shop · Tool diver
Pagani Design PD-1702 — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Pagani Design
PD-1702
42mm · Automatic$132
Common cross-shop · Tool diver
Sugess Seestern DOX V3 — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Sugess
Seestern DOX V3
42mm · Automatic$199
Pro diver · Automatic
Sugess Seestern Vintage S407 600T — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Sugess
Seestern Vintage S407 600T
39mm · Automatic$249
Pro diver · Automatic
Sugess Ocean Star S450 YM — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Sugess
Ocean Star S450 YM
40mm · Automatic$449
Pro diver · Automatic
Seestern Sub 300 V4 — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Seestern
Sub 300 V4
42mm · Automatic$10
Automatic · Same size
Seestern S456 GMT — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Seestern
S456 GMT
41mm · Automatic GMT$299
Similar size · Sapphire
Seestern S450 Ocean Star — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Seestern
S450 Ocean Star
40mm · Automatic$299
Automatic · Sapphire
Microbrand picks· 12

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

Borealis Watch Co. Caloura 300m — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Borealis Watch Co.
Caloura 300m
42mm · Automatic$275
Common cross-shop · Pro diver
Borealis Watch Co. Jamanta — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Borealis Watch Co.
Jamanta
42.50mm · Automatic$415
Common cross-shop · Pro diver
Borealis Watch Co. Estoril 300 GMT — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Borealis Watch Co.
Estoril 300 GMT
41.50mm · Automatic$600
Common cross-shop · Pro diver
Boldr Odyssey Freediver — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Boldr
Odyssey Freediver
40mm · Automatic$649
Common cross-shop · Pro diver
Echo/Neutra Cristallo Professional Diver 500m — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Echo/Neutra
Cristallo Professional Diver 500m
42mm · Automatic$1,450
Common cross-shop · Pro diver
Christopher Ward C60 Trident GMT 300 — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Christopher Ward
C60 Trident GMT 300
40mm · Automatic$1,450
Common cross-shop · Pro diver
Spinnaker White Frost — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Spinnaker
White Frost
43mm · Automatic$550
Common cross-shop · Pro diver
Astor + Banks Tobacco — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Astor + Banks
Tobacco
40mm · Automatic$1,149
Common cross-shop · Pro diver
Boldr Odyssey 40mm — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Boldr
Odyssey 40mm
40mm · Automatic$799
Common cross-shop · Pro diver
Christopher Ward C60 Lympstone — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Christopher Ward
C60 Lympstone
40mm · Automatic$1,615
Common cross-shop · Pro diver
Phoibos Wave Master — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Phoibos
Wave Master
42mm · Automatic$309
Pro diver · Automatic
Geckota Satin Reef Green — alternative to Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition
Geckota
Satin Reef Green
42mm · Automatic$349
Common cross-shop · Pro diver
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