Seiko 6309 classic

Seiko 6309 Vintage Turtle – A Blast From The Past

Without mincing words, there are many Seiko diver models out there that will intrigue watch collectors, but guess what?

The Seiko 6309 turtle is every collectors’ dream and for good reasons too.

While the Seiko 6309 falls under the third generation of Seiko professional/recreational divers, this iconic timepiece replaced the 6105 series, which were quite popular in 1976.

Like many vintage Seiko models that have graced the watch industry, the last digit of the Seiko 6309 reference number shows the original market it was designed for.

So while Seiko 6309-7049 was intended for the North American market, the 7040 series was meant for the Japanese market and the rest of the world.

It will also interest you to know that from 1976 to 1981, Seiko released the 6306-7000 model, which was a cousin to Seiko 6309.

While these watches had several things in common, the 6306 model had a unique hacking movement along with a Kanji day wheel.

Also, the 6306 model was exclusively designed to be sold in the Japanese domestic market.

Now, that we have established some background, let’s take a moment to learn about the Seiko brand.

About Seiko

Call them one of the most established watch brands, and you’ll not be wrong.

Since their sojourn into the watch industry, Seiko has continued to release top-notch watches that have become every collectors’ dream.

Their consistency in the watch industry has pitched them with the best watch brands out there, little wonder why they are a global brand.

But before coming into the limelight, the company started off in a small shop in Ginza, Tokyo, in 1881, where their 21-years-owner began repairing and selling watches.

Given the patronage and success enjoyed by the brand, the company moved to establish a new factory in Seikosha 11 years later.

It was here they launched their first-ever pocket watch, the Timekeeper, in 1895.

After the Timekeeper came the company’s first-ever wristwatch to feature the Seiko brand name.

Today, the company has risen to global prominence, and its collections of impeccable watches are still highly sought after.

Popular specifications

  • Movement: Powered by Seiko’s signature 6309 Automatic movement
  • Diameter: 45mm
  • Jewels: 17
  • Vibration per hour: 21,600 BPH
  • Power reserve: 47 hours

Seiko 6309 Case

This superb timepiece spots a quality stainless steel case.

Like many Seiko watches we have come across, this one also has a screw-down crown along with a robust case back.

Overall, this watch measures 45mm in diameter.

Though it may come off as the bruiser, we are happy to inform you that it wears comfortably.

And that’s because of the short lugs on the cushion case.

Unlike predecessors, the screw-down crown on this watch debuts some serious size.

Similarly, the knurls of the crown appear entirely flushed with the case.

On the flip side, the case itself features a brushed surface along with polished undersides.

Featuring a 22mm lug width, Seiko 6309 made a remarkable change from its predecessor, which had only 19mm lug wth.

Seiko 6309 caseback

Seiko 6309 Dial

The Seiko 6309 features a masterpiece dial with many unique details that catch the eye.

To start with, the signature sword hour index at “noon” displays an impressive design.

Plus, the circular lume dots on the hours and small none-like shapes at 6 and 9, respectively, complement the dial’s remarkable personality.

Additionally, the sweep seconds hand of this watch features a lollipop type circle near its end.

Like many Seiko dive watches, this one has a day/date window that is not only white but also sits within a chamfered window.

The accompanying texts on the dial are visible, legible and are printed without applied nomenclature.

While the “Water Resist” inscription was switched from red to yellow on this version, it still has the 150m notice surrounding it.

Inside this watch sits its magnificent 17 jewels automatic movement, which powers it.

Even though it is a non-hand-winding or hacking piece, we are happy that it does its job perfectly.

Seiko 6309 Movement

This extraordinary timepiece is powered by the company’s signature calibre 6309 17 jewels automatic movement.

And if there is anything we love about this movement, it is the fact that it is a proper workhouse.

As a matter of fact, there have been many stories of this watch working perfectly even after 30+ years of not being serviced.

Given the performance of this watch, you’ll agree that the watch’s power reserve is top-notch.

Unfortunately, even though the 6309 is automatic, it doesn’t hack or hand wind like most Seiko dive watches.

Thanks to its quickset mechanism, setting the day and date of this watch is a stroll in the park.

Seiko 6309 Bracelet

While the Seiko 6309 comes with the original flat vent GL-831 straps, we are happy to inform you that you can switch things up by pairing it with silicon or NATO straps.

Though silicon straps are a bit more pliable and comfortable, NATO straps also work very well.

Also, you can opt for Seiko rubber straps if you think they will be more comfortable.

Overall, the beauty about the Seiko 6309 turtle’s straps is that it gives you a lot of options you can play around with.


  • Water-resistant up to 150m
  • Features a brilliant dial with a whopping 47 hours of power reserve
  • Top-notch design and Impeccable finishing
  • Bracelet feels comfortable
  • Lots of options when it comes to straps


  • A little too bulky and may not fit some wrists

Frequently asked questions

What type of movement does Seiko Giugiaro use?

This watch is powered by Seiko’s signature 6309 17 jewels automatic movement with 47 hours power reserve.

How much does it cost?

The Seiko 6309 isn’t too pricey, and for $400 to $500, you can add this incredible timepiece to your collection.

That said, we expect prices to tick up in the coming years as the watch is extremely collectable.

Is it water-resistant?

Like many Seiko dive watches, this one is water-resistant up to 150m.

While it may not perform as other Seiko dive watches that are water-resistant up to 200m, it still manages to perform well.


Right from the get-go, the Seiko 6309 turtle diver is one of those timepieces you want to add to your collections and for the right reason.

And guess what, it works and looks good in most settings.

Though not as expensive as many luxury watches out there, this timepiece is one of those watches that even luxury watch lovers will get jealous of.

For watch collectors and professionals looking for a good dive watch that lives up to its promise, you’ll not be disappointed to give the Seiko 6309 diver a try.