The history of Seiko Dive Watches goes back to 1965 with their very first model. From then on Seiko have lead the way in innovation, design technology, materials and style. You may have already looked at the Seiko Tuna and Samurai – here we look at the Seiko Turtle dive watch.
Index
- Introduction to the Seiko Turtle
- Seiko Turtle watches for sale
- Specification
- Video Reviews
- Old Turtle versus New Turtle
- References
An introduction
In 1976 Seiko released the first of their “cushion cased” or “turtle shell” style diver’s watches. The Seiko 6306 & 6309 were produced from 1976 (1) until 1988. Recognisable from their soft cushion shaped case these watches also featured a recessed crown at the 4 o’clock position and day / date indicators. Both models were driven by an automatic (mechanical self wind) movement.
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UK sellers – updated 21st July 2019
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Chronodivers.com is an affiliated partner of Amazon.com. Here’s a selection from their range of Seiko 200m dive watches (not specifically the “Turtle” case style)
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USA Sellers – updated July 21, 2019
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Specification (current models)
The Seiko Turtle was re-introduced in 2016. Available in 4 variants
- steel with black dial / bezel (SRP777)
- steel with black / gilt detailing (SRP775)
- steel with blue detailing (SRP773)
- steel with “pepsi” red & blue detailing (SRP779)
Since then Seiko have added a couple of new variants
- steel with PADI red & blue details (SRPA21K1)
- all black tactical version (SRPC49K1)
Exterior
Case Material : Stainless steel
Glass Material : Hardlex
Band Material : Silicon
Case Thickness : 13.4㎜
Case Diameter : 45㎜
Movement
Calibre Number : 4R36
Movement Type : Automatic with manual winding capacity
Duration : Approx. 41 hours
Accuracy : +45 to -35 seconds per day
Other Details
LumiBrite : Lumibrite on hands and indexs
Water Resistance : 200m / 660ft diver’s
Features
- 24 jewels
- Day/Date display
- Screw case back
- Stop seconds hand function
- Unidirectional rotating bezel
Old Turtle versus New Turtle
The main differences between the new Seiko Turtle watches and those from 1978 to 1988 (6306 / 6309) are as follows (2)
- Case depth increased from 13mm to 14mm
- Addition of a softer silicone strap (previously harder rubber)
- The lollipop on the seconds hand was moved from head to tail
- Seiko 6309 – 17 jewel automatic movement – non-winding non-hacking changed to Calibre 4R36 with 24 jewels with hand wind and seconds stop function.
Video Reviews
Seiko Turtle PADI SRPA21K1 Prospex Review
John Egerton’s thoughts on the popular PADI Turtle re-issue from Seiko. Is it worth it?
Seiko Prospex SRPA21 “PADI Turtle” One Week On the Wrist
Ankit Blanket’s review of the Seiko SRPA21 “PADI Turtle” dive watch after one week …
External references / further reading
- (1) Adventures in Amateur Watch Fettling
- (2) Fratello Watches – Seiko 6306
- (3) The Watch Bloke – 6306-7001
If you found this page via a search engine – please pop over to our generic Seiko Divers watch page. You will find plenty more information on iconic styles from Japan’s leading manufacturer of quality dive watches.
