Project Description

Seiko International Edition Prospex Turtle SRPD45K1 £SOLD

We make no apologies for loving Seikos. Bang for the buck, at every price point, the famous Japanese brand delivers time and again.

We also make no apologies for ‘bending the rules’. Most of the watches that we sell at The Chrono Duo are vintage, usually from the second half of the last century.

This watch is brand new. But we’re happy to have got our hands on one of these limited edition green Turtles recently.

In 1976 Seiko released the first of their “cushion cased” or turtle shell diver’s watches. The Seiko 6306 & 6309 were produced from 1976-1988. The cushion shaped case also became well known for a recessed screw down crown at the 4 o’clock as well as day / date indicators. Both models were driven by an automatic movements.

The Prospex name is synonymous with performance, durability, and athleticism, and this distinctive diving watch displays this in abundance. Aggressive, legible and handsome, the emerald green dial, tan “Lumibrite” hour markers, white hour & yellow minute hand (also in Lumibrite, naturally) keep from messing up the aesthetic of the original pieces these emulate.

Delivering in the water, the watch gives 200m of water-resistance, a classic 5 minute marker bezel, day and date display, all shown on a very easy-to-read display.The dial design has just one objective, maximum legibility.

The new colour is inspired by the Sea Grape, also known as Caulerpa lentillifera, from the family of algae, which can be found in the waters off Okinawa, Japan. The visual effects and color combination on the Sea Grape are spectacular. The emerald green used in the dial, where you can see various shades of green just from looking at them from different angles, as well as lighting when it reflects off of the dial.
The movement inside is Seiko’s 4R36 caliber, that beats at 21,600 bph and has a power reserve of 41 hours. The day/date is displayed at three o’clock. The Turtle’s case diameter in excess of 44mm does put it slightly on the larger side, though due to the cushion case shape and the reasonable lug-to-lug distance (48mm) makes it much more comfortable than you might think for a big watch. Having the Crown at 4 o’clock also limits this digging into the back of your hand.

Prospex Turtles also offers a unidirectional bezel, screw down crown and 200m of water resistance. It comes shipped on a (naturally) green silicone strap that matches the case finish well and means the watch is perfectly ready for water. The normally black bezel of the Turtle is given a gold finish for the 0-20 minute markings, adding a nice relief to the black.

The combination of all of these elements would be attractive enough in any watch but Seiko’s level of fit and finish takes things to another level. For example, there’s absolutely no play in the bezel or crown, the anti-reflective coating is excellent.

So, it’s brand new, never been worn. It’s comfortable, versatile and a great looking watch so in a word or two; another absolute Seiko steal!
We bought this watch directly from a contact in the Far East.
As we said, it’s a limited edition with only 1800 pieces available. And these are only being released in Malaysia, Hong Kong, Singapore, Brunei and Macao. It comes with tags, boxed, manual and of course its Official Seiko International warranty. So we’re lucky to have got one. And so will you be (don’t forget there will be no import duties etc. by buying from us) if you love Seikos like we do.


  • Reference: Prospex Turtle SRPD45K1

    Case Material:  Stainless Steel

    Case Width:  45 mm excluding crown

    Crystal:  Sapphire

    Dial: Green dial with Arabic numerals

    Hands: Luminous hours, minutes and seconds,

    Crown:  Original 

    Movement:  Signed 4R36

    Functions:  Hours, minutes, seconds, date

    Case Back: Limited edition steel

    Strap:  Steel bracelet

    Additional Features: Full box and papers.