The Iconic Seiko “Turtle”:
From Past until Present
November 13, 2018
The Seiko “Turtle” is one of the Japanese watch maker’s best selling and iconic watches. Its timeless cushion case design has captivated generations of watch lovers up until this day.
The popular “Turtle” lineup started when Seiko manufactured the 6306 in 1976 and eventually the 6309 which is an identical cousin of the 6306 with a few differences (hacking movement and Kanji day wheel). The 6309 was eventually produced up until 1988 and was well-loved for years.
Then come 2016 when Seiko announced that they will be producing a re-issue of the popular “turtle” diver into its modern counterpart and specifications.
It all exploded from there. Vintage and new collectors, enticed by the revival of the Seiko Cult Classic, tried to snatch up model after model of both old and new Seiko Turtles.
Limited or Numbered edition owners benefited the most out of the Seiko Turtle trend as their pieces either maintained a healthy resale value or even doubled in value due to the supply and demand.
Here is a complete list of all Seiko “Turtle” models from 1976 until today.
Note: The list is a work in progress and will be constantly updated whenever a new Turtle releases comes out or if I missed a previously released model

The Seiko Turtle 6309's timeless cushion case design
Source: Here
Production: 1976 - 1981
Seiko 6306 Series
Movement: Seiko 6306 Automatic
Highlights: 21 Jewels, Kanji Day Wheel, Hacks, 150m Water Resistance
Diameter: 45mm
Thickness: 13mm
Lug Size: 22mm
Source: Here
Production: 1978 - 1979
Seiko 6306 Scubapro 450
Movement: Seiko 6306 Automatic
Highlights: Scubapro 450 branding on dial, 150m Water Resistance, Very Rare! Be Careful with Reproductions
Diameter: 45mm
Thickness: 13mm
Lug Size: 22mm
Source: Here
Production: 1976 - 1988
Seiko 6309 Series
Movement: Seiko 6309 Automatic
Highlights: 17 Jewels, 150m Water Resistance
Diameter: 45mm
Thickness: 13mm
Lug Size: 22mm
Source: Here
Production: 2018 only
Seiko SRPD01 "Dawn Grey"
Movement: Seiko 4R36 Automatic
Highlights: Lumibrite lume, Hardlex lens, 200m Water Resistance, Stainless Steel Case, Limited to 2018 pcs.
Diameter: 45mm
Thickness: 13mm
Lug Size: 22mm