In 2018 Seiko introduces a line of diving watches called “Save The Ocean”, which donate a portion of the proceeds to organizations that study and preserve the oceans.
One such organization is the Ocean Learning Center of Fabien Cousteau, grandson of the famous underwater explorer Jacques-Yves Cousteau, with whom Seiko has collaborated on various initiatives.
Since the launch of the first models, Seiko has introduced new Save The Ocean watches every year, inspired by different scenarios of the oceans and the animals that populate them.
Humpback Whale
The Save The Ocean series debuts in 2018 with a design inspired by the streaks of humpback whales and the colors of the depths of the ocean.
The first four models, with a stainless steel case, are followed by three other versions with a dark PVD case.
Turtle Save The Ocean
Ref: SRPC91 (4R36-05H0)
Caliber: 4R36
45mm stainless steel case, Hardlex crystal, screw-down crown, 24 jewels, 41 hours power reserve, 21,600 bph, manual winding, hacking function.
Samurai Save The Ocean
Ref: SRPC93 (4R35-01X0)
Caliber: 4R35
44mm stainless steel case, Hardlex crystal, screw-down crown, 23 jewels, 41 hours of power reserve, 21.600 bph, manual winding, hacking.
Solar Chrono Save The Ocean
Ref: SSC675 (V175-0AD0)
Caliber: V175
43mm stainless steel case, Hardlex crystal, screw-down crown, solar, ±15 seconds/month.
Solar Tuna STO
Ref: SNE518 (V157-0CX0)
Caliber: V157
46mm stainless steel case, Hardlex crystal, screw-down crown, solar, ±15 seconds/month.
Black Turtle Save The Ocean
Ref: SRPD11 (4R36-05H0)
Caliber: 4R36
45mm stainless steel case, Hardlex crystal, screw-down crown, 24 jewels, 41 hours power reserve, 21,600 bph, manual winding, hacking function.
Black Samurai Save The Ocean
Ref: SRPD09 (4R35-01X0)
Caliber: 4R35
44mm stainless steel case, Hardlex crystal, screw-down crown, 23 jewels, 41 hours of power reserve, 21.600 bph, manual winding, hacking.
Black Solar Chrono Save The Ocean
Ref: SBDL057 (V175-0AD0)
Caliber: V175
43mm stainless steel case, Hardlex crystal, screw-down crown, solar, ±15 seconds/month.
Great White Shark
In 2019, new Save The Ocean models are introduced, inspired by the great white shark, whose fin can be glimpsed among the waves of the rough sea on the dial.
Turtle STO Great White Shark
Ref: SRPD21 (4R36-07D0)
Caliber: 4R36
45mm stainless steel case, Hardlex crystal, screw-down crown, 24 jewels, 41 hours power reserve, 21,600 bph, manual winding, hacking function.
Samurai STO Great White Shark
Ref: SRPD23 (4R35-03G0)
Caliber: 4R35
44mm stainless steel case, Hardlex crystal, screw-down crown, 23 jewels, 41 hours of power reserve, 21.600 bph, manual winding, hacking.
Solar Chrono STO Great White Shark
Ref: SSC741 (V175-0EV0)
Caliber: V175
43mm stainless steel case, Hardlex crystal, screw-down crown, solar, ±15 seconds/month.
The three initial models (Turtle, Samurai and Solar Chrono) are joined by two other editions: a King Turtle and a fourth generation Monster.
King Turtle Save The Ocean
Ref: SRPE07 (4R36-06Z0)
Caliber: 4R36
45mm stainless steel case, sapphire crystal, screw-down crown, 24 jewels, 41 hours power reserve, 21,600 bph, manual winding, hacking function.
Monster Save The Ocean
Ref: SBDY045 (4R36-08C0)
Caliber: 4R36
42mm stainless steel case, Hardlex crystal, screw-down crown, 24 jewels, 40 hours of power reserve, 21,600 bph, manual winding, hacking.
Manta Ray
2020 sees the introduction of the Manta Ray models, King Turtle and King Samurai, subsequently proposed in a different color and with silicone straps.
King Turtle STO Manta Ray
Ref: SRPE39 (4R36-06Z0)
Caliber: 4R36
45mm stainless steel case, sapphire crystal, screw-down crown, 24 jewels, 41 hours power reserve, 21,600 bph, manual winding, hacking function.
King Samurai STO Manta Ray
Ref: SBDY065 (4R35-03W0)
Caliber: 4R35
44mm stainless steel case, sapphire crystal, screw-down crown, 23 jewels, 41 hours of power reserve, 21.600 bph, manual winding, hacking.
King Turtle STO Manta Ray 2
Ref: SRPF77 (4R36-06Z0)
Caliber: 4R36
45mm stainless steel case, sapphire crystal, screw-down crown, 24 jewels, 41 hours power reserve, 21,600 bph, manual winding, hacking function.
King Samurai STO Manta Ray 2
Ref: SBDY081 (4R35-04D0)
Caliber: 4R35
44mm stainless steel case, sapphire crystal, screw-down crown, 23 jewels, 41 hours of power reserve, 21.600 bph, manual winding, hacking.
Antarctica Penguin
The latest models in the Save The Ocean series, introduced in 2021, are inspired by Antarctica. The footprints of a penguin are depicted on the “frozen” dial.
Monster STO Antarctica
Ref: SRPG57 (4R36-11C0)
Caliber: 4R36
42mm stainless steel case, Hardlex crystal, screw-down crown, 24 jewels, 40 hours of power reserve, 21,600 bph, manual winding, hacking.
Baby Tuna STO Antarctica
Ref: SRPG59 (4R35-04Z0)
Caliber: 4R35
43mm stainless steel case, Hardlex crystal, screw-down crown, 24 jewels, 40 hours of power reserve, 21,600 bph, manual winding, hacking.
Summary of the models
Humpback Whale
| Nickname | Ref. | Other Ref. | MC Ref. | Caliber | Limited |
|---|---|---|---|---|---|
| Turtle STO | SRPC91 | SRPC91K1, SRPC91K, SBDY021 | 4R36-05H0 | 4R36 | No |
| Samurai STO | SRPC93 | SRPC93K1, SRPC93K, SBDY019 | 4R35-01X0 | 4R35 | No |
| Solar Chrono STO | SSC675 | SSC675P1, SBDL055 | V175-0AD0 | V175 | No |
| Solar Tuna STO | SNE518 | SNE518P1, SBDJ045 | V157-0CX0 | V157 | No |
| Turtle STO Black | SBDY027 | SRPD11K1, SRPD11K | 4R36-05H0 | 4R36 | No |
| Samurai STO Black | SBDY025 | SRPD09K1, SRPD09K | 4R35-01X0 | 4R35 | No |
| Solar Chrono STO Black | SBDL057 | SSC701P | V175-0AD0 | V175 | No |
Great White Shark
| Nickname | Ref. | Other Ref. | MC Ref. | Caliber | Limited |
|---|---|---|---|---|---|
| Turtle STO Great White Shark | SRPD21 | SRPD21K1, SRPD21K | 4R36-07D0 | 4R36 | No |
| Samurai STO Great White Shark | SRPD23 | SRPD23K1, SRPD23K | 4R35-03G0 | 4R35 | No |
| Solar Chrono STO Great White Shark | SSC741 | SSC741P1 | V175-0EV0 | V175 | No |
| King Turtle STO Great White Shark | SRPE07 | SRPE07K1, SRPE07K | 4R36-06Z0 | 4R36 | No |
| Monster STO Great White Shark | SRPE09 | SRPE09K1, SRPE09K | 4R36-08C0 | 4R36 | No |
Manta Ray
| Nickname | Ref. | Other Ref. | MC Ref. | Caliber | Limited |
|---|---|---|---|---|---|
| Turtle STO Manta Ray | SRPE39 | SRPE39K1, SRPE39K | 4R36-06Z0 | 4R36 | No |
| Samurai STO Manta Ray | SRPE33 | SRPE33K1, SRPE33K | 4R35-03W0 | 4R35 | No |
| Turtle STO Manta Ray 2 | SRPF77 | SRPF77K1, SRPF77K | 4R36-06Z0 4R36-08D0 | 4R36 | No |
| Sanurai STO Manta Ray 2 | SRPF79 | SRPF79K1, SRPF79K | 4R35-04D0 | 4R35 | No |
Antarctica Penguin
| Nickname | Ref. | Other Ref. | MC Ref. | Caliber | Limited |
|---|---|---|---|---|---|
| Monster STO Antarctica | SRPG57 | SRPG57K1, SRPG57K | 4R36-11C0 | 4R36 | No |
| Baby Tuna STO Antarctica | SRPG59 | SRPG59K1, SRPG59K | 4R35-04Z0 | 4R35 | No |
Summary of the movements
Caliber 4R36
| Type | Automatic |
| Power reserve | 40 hours |
| Bph | 21.600 |
| Jewels | 24 |
| Lift Angle | 53° |
| Manual winding | Yes |
| Hacking | Yes |
Caliber 4R35
| Type | Automatic |
| Power reserve | 41 hours |
| Bph | 21.600 |
| Jewels | 23 |
| Lift Angle | 53° |
| Manual winding | Yes |
| Hacking | Yes |