A comprehensive collection of Turtles, King Turtles, Mini Turtles, Slim Turtles, Captain Willards and Land Tortoises. Errors and missing references may exist—please use the contact form to notify.
109 models|Last updated
AutomaticQuartz
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Reference Note: JDM (Japan Domestic Market) references are listed where found, allowing you to identify both global and regional model variants.
Turtle Original (1976-1980s)
The Seiko Turtle originated in 1976 with the 6306-7001, a 150m automatic diver recognizable by its cushion-shaped case and 4 o'clock crown guard. Seiko produced the line through the early 1980s using the 6306A and later 6309A automatic calibers, as well as the 7548 quartz movement.
Notable variants include the SCUBAPRO 450 collaboration, limited to approximately 1,000 units, and the extremely rare Antarctica expedition models produced in quantities of around 20 pieces each.
The original Turtle series established the case shape and design language that Seiko would revisit decades later across multiple product lines.
Turtle 6306
6306-7000 / 6306-7001
Cal. 6306A
Year: 1976
Automatic
6306-7000 is the Japanese-market version, 6306-7001 the export version. Catalog code YCS018.
Turtle 6309
6309-7040 / 6309-7049
Cal. 6309A
Year: 1976
Automatic
6309-7040 is the general export version, 6309-7049 the North American version. Catalog codes DE091 (6309-7040) and DE095 (6309-7049).
SCUBAPRO 450
6306-7001
Collaboration with Scubapro - Cal. 6306A
Year: 1978
Automaticlimited to ~1,000 pieces
MSST1978-79
6306-7001
Antarctica Expedition - Cal. 6306A
Year: 1978
AutomaticExpedition Gift Only - ~20 pieces (Extremely Rare)
MSST1979-80
6306-7001
Antarctica Expedition - Cal. 6306A
Year: 1979
AutomaticExpedition Gift Only - ~20 pieces (Extremely Rare)
Turtle New Generation (2016-2025)
Reintroduced in 2016 under the Prospex line, the New Generation retains the original cushion case silhouette but updates everything inside. The movement is now the 4R36 (hacking and hand-winding), the case grows to 45mm with a 22mm lug width, and the crown sits at 3.8 o'clock. Crystal remains Hardlex.
Produced through 2023 across a wide range of standard, limited, and regional editions, including the PADI and Save the Ocean collaborations.
Quiet ISO update: Around 2022, Seiko silently updated production across the line, adding a lume pip at 3 o'clock to maintain ISO 6425 compliance.
Premium variant of the New Generation. Same 45mm case and 4R36 movement, but sapphire replaces Hardlex and ceramic replaces the aluminum bezel insert, improving scratch resistance and long-term durability.
Distinguished by a range of textured dials, with the waffle pattern becoming its signature.
Often nicknamed the "Baby Turtle" by collectors, the Mini Turtle scales the Turtle case down to 42mm with a 20mm lug width, making it more accessible for smaller wrists. The crown moves to 3.0 o'clock, giving the case a more symmetrical profile than its larger siblings.
It runs the 4R35 automatic, which shares the hacking and hand-winding of the 4R36 but omits the day complication. Crystal remains Hardlex. Released in a variety of colorways, several as regional or limited-edition variants.
The vintage Slim Turtle refers to Seiko's thinner-cased dive watches from the late 1970s and 1980s. They share the Turtle's cushion case silhouette but with a reduced case height, offering a more everyday-wearable alternative while keeping 150m water resistance.
Powered by either the 7548 quartz caliber or the 6309 automatic caliber. Seiko produced them in both JDM (Japanese Domestic Market) and export configurations, with differences in dial text, day wheel languages, and color options between markets.
Slim Turtle Quartz Black
7548-7000
JDM Black - Cal. 7548 Quartz
Year: 1978
Quartz
Slim Turtle Quartz Pepsi
7548-700A
Export Pepsi - Cal. 7548 Quartz
Year: 1978
Quartz
Slim Turtle Quartz Orange
7548-700C
JDM Orange - Cal. 7548 Quartz
Year: 1978
Quartz
Slim Turtle Quartz Teal
7548-700C
JDM Teal (rare variant) - Cal. 7548 Quartz
Year: ~1984
QuartzExtremely Rare (December 1984 only)
Slim Turtle Automatic
6309-729A
Automatic Slim Turtle - Cal. 6309
Year: 1982
Automatic
Slim Turtle Automatic Orange
6309-729B
Orange dial (rare) - Cal. 6309
Year: 1982
AutomaticVery Rare Limited Run (May 1982)
Slim Turtle Modern (2022-2023)
The modern Slim Turtle is a compact reinterpretation of the 1970 6105-8000 diver (the Captain Willard lineage), sold by collectors under the Slim Turtle name for its slimmer cushion case: 41mm across and just 12.3mm thick. It runs the 6R35 automatic with a 70-hour power reserve, a significant upgrade over the movements in both the vintage Slim Turtles and the New Generation series.
Specification includes sapphire crystal, ceramic bezel insert, 200m water resistance, and a crown at 4.1 o'clock. Sold under the SPB reference numbering as part of Prospex, placing it above the SRP-series Turtles in Seiko's hierarchy.
Slim Turtle White
SPB313 / SBDC171
White Dial on Bracelet - Cal. 6R35
Year: 2022
Automatic
Slim Turtle Black/Gold
SPB315 / SBDC173
Black Gilt Dial on Bracelet - Cal. 6R35
Year: 2022
Automatic
Slim Turtle Black
SPB317
Black Dial on Silicone Strap - Cal. 6R35
Year: 2022
Automatic
Slim Turtle White Birch
SPB333 / SBDC187
White Birch Dial - Cal. 6R35
Year: 2023
AutomaticSave the Ocean Limited Edition - 5,000 pieces
Slim Turtle Night Vision
SPB335 / SBDC183
Night Vision Diver - Cal. 6R35
Year: 2023
AutomaticNight Vision Series Limited - 4,500 pieces
Captain Willard (1970-2023)
The Captain Willard takes its name from Martin Sheen's character in Apocalypse Now (1979), in which Sheen wore a Seiko 6105-8110 on screen. The original 6105-8110, produced in the early 1970s, features an asymmetrical cushion case with a distinctive bayonet-style crown at 4 o'clock and is powered by the 6105B automatic caliber.
Seiko has since produced modern reissues under the SLA and SPB reference lines, using either the high-grade 8L35 movement or the 6R35 with 70-hour power reserve. The modern interpretations retain the period-correct case proportions and crown design while adding contemporary specifications such as sapphire crystal and 200m water resistance.
6105-8110
6105-8110
Original Captain Willard - Cal. 6105B
Year: 1970
AutomaticIconic Apocalypse Now timepiece
SLA033
SLA033 / SBDX031
6105 Limited Edition - Cal. 8L35
Year: 2019
Automaticlimited to 2500 pieces
SLA049
SLA049 / SBDX045
Naomi Uemura 80th Anniversary - Cal. 8L35
Year: 2021
AutomaticLimited Edition - 1,200 pieces
SLA051
SLA051 / SBDX047
Grey Dial - Cal. 8L35
Year: 2021
Automatic
SLA061
SLA061 / SBDX051
Black Series - Cal. 8L35
Year: 2022
Automaticlimited to 1000 pieces
SLA063
SLA063
Northern Lights - Cal. 8L35
Year: 2022
AutomaticLimited Edition - 500 pieces
SLA069
SLA069 / SBDX057
1970 Diver's Modern Re-interpretation - The Naomi Uemura Limited Edition Mont Blanc - Cal. 8L35
Year: 2023
Automaticlimited to 500 pieces
SBDC181
SBDC181
Helly Hansen Collab - Cal. 6R35
Year: 2022
Automaticlimited to 500 pieces
SPB151
SPB151 / SBDC109
Black - Cal. 6R35
Year: 2020
Automatic
SPB153
SPB153 / SBDC111
Green - Cal. 6R35
Year: 2020
Automatic
SPB183
SPB183 / SBDC123
Blue - Cal. 6R35
Year: 2020
Automaticlimited to 5500 pieces
SPB237
SPB237 / SBDC143
Grey Birch - Cal. 6R35
Year: 2021
Automatic
SPB257
SPB257 / SBDC157
The Black Series - Cal. 6R35
Year: 2022
AutomaticLimited Edition - 5,500 pieces
Captain Willard Mystic Lagoon
SPB288
Textured Blue Dial / Rose-Gold Bezel Accents - Cal. 6R35
Year: 2021
AutomaticSeiko Boutique Exclusive
Captain Willard Save the Ocean Antarctica
SPB301 / SBDC169
White Glacier Dial / Blue Bezel - Cal. 6R35
Year: 2022
AutomaticSave the Ocean Special Edition
Land Tortoise - Land Exploration (2021-2024)
The Land Tortoise adapts the Turtle case for land-based use by replacing the rotating dive bezel with a fixed compass bezel marked with cardinal directions, intended as a directional reference when used with the sun rather than as a functional electronic compass.
Powered by the 4R35 automatic, retaining 200m water resistance despite its land-oriented positioning. Released in earth-toned colorways suited to field and outdoor use, visually distinct from the ocean-themed palette of the dive-oriented Turtle models.
Land Tortoise Taupe
SRPG13 / SBDY099
Taupe/Green Compass - Cal. 4R35
Year: 2021
Automatic
Land Tortoise Blue
SRPG15 / SBDY101
Blue Compass - Cal. 4R35
Year: 2021
Automatic
Land Tortoise Black
SRPG17 / SBDY103
Black/Gilt Compass - Cal. 4R35
Year: 2021
Automatic
Land Tortoise Rose Gold
SRPG18
Rose Gold/Brown Compass - Cal. 4R35
Year: 2021
Automatic
Land Tortoise SRPH17
SRPH17 / SBDY113
Compass Model - Cal. 4R35
Year: 2021
Automatic
Land Tortoise US Special Edition
SRPJ31
US Special Edition - Cal. 4R35
Year: 2022
Automatic
Land Tortoise Black Series Night Vision
SRPH99 / SBDY121
Black Case / Grey Dial / Green Lume - Cal. 4R35
Year: 2022
AutomaticLimited Edition - 7,000 pieces
Land Tortoise Silfra
SRPK77
Textured Black Dial / Green & Black Compass Bezel - Cal. 4R35
