My Cart


SKU: vws2313

Seiko - A Vintage Grandfather Tuna Professional 600 Diver Titanium - Model Ref: 6159-7010 - c.1975

A Superb and Rare Example of the Iconic Seiko 'Grandfather' Tuna Professional 600m Diver

View full specification

Enquire Now

Vintage Watch Specialist Buyer Protection

  • 12 Month Warranty Included
  • Authenticity Guarantee
  • Fully Insured Next Day Delivery
We ship watches worldwide tracked and insured More Information

A Superb and Rare Example of the Iconic Seiko 'Grandfather' Tuna Professional 600m Diver, in Fantastic Condition, a Rare non "M" Iteration Making it One of the Earliest in Production Terms!

The story of Seiko began in 1881, when a 21-year-old entrepreneur, Kintaro Hattori, opened a shop selling and repairing watches and clocks in central Tokyo. Just eleven years later, in 1892, he established the 'Seikosha' factory. 

Seiko is known for introducing one of the world's first quartz wrist watches as well as the world's first quartz watch with a chronograph complication, it was also the first manufacturer to make a titanium divers watch.

What’s On Offer 

The Seiko 'Tuna' was created after professional divers in the late 1960s complained about watch failures at working depths. This led Seiko to undertake the task of producing a tool watch that could be relied upon to withstand all the pressures of working while submerged. Cue the now legendary 'Grandfather' Tuna with a dive depth of a whopping 600 metres - a huge feat in dive watchmaking and featuring notable industry firsts including its titanium case, ceramic-coated titanium shroud, L-shaped glass gasket seal, and vented rubber strap. All in all, over 20 patents were granted to this, at that time, revolutionary timepiece. 

The 6159-7010 was introduced in 1975 and is distinguished by its screwed-on shroud which also led to it being affectionately named the 'Tuna'. The shroud protects the case while also allowing for 2 access points to spin the bidirectional bezel - 

It also adds, substantially, to the watch's rather meaty proportions - a whopping 50.5mm in this instance, but you wouldn't think so when it's on your wrist, largely due to the lugs integrating with the case and its lightweight titanium case!

This particular example is likely to have been one of the earliest as it lacks the “m” for “meters” next to the depth rating and is much rarer than the "m" versions, produced later in the line-up. The production period was relatively short at just 4 years, from 1975 to 1979, and well-preserved examples such as this are becoming rarer every day. Seiko has produced many dive watches throughout the years but this is the original real deal Tuna, an iconic reference from Seiko and getting harder to find, especially in as nice a condition as this, as you have to remember most of these will have been used for there intended purpose by commercial divers! 

This watch is in fantastic condition with a blemish-free rich deep-set black dial boasting lumed large dot hour markers, chunky lumed hands, a lollipop sweep hand and date aperture at 3 o'clock. The dial is encapsulated under mineral glass and crowned with a rich black bidirectional bezel. It also comes on its extremely well-preserved and original Seiko 'vented' rubber strap.

Despite this watch's mass, it is actually a super comfortable wearer, of course, it will not fit under your dress suit, but for more casual wear this watch is a real delight, both on and off your wrist. 

Model Ref
 Original Seiko Rubber
Movement Type
Power reserve
 72 Hours
Date of issue
 12 Months VWS
Width (without crown)
Lug width
Lug height
(lug to lug) 50mm 
Wrist size

Do you have questions about this watch?

Contact our team below and we'll be happy to help you with this watch or any other watch you might be interested in

Read out latest customer reviews

See why buyers from across the world trust Vintage Watch Specialist

"An outstanding watch at a fair price with superb service before the purchase, safe delivery and helpful advice throughout. I cannot recommend the company highly enough."


"A lovely little watch, reasonably priced, in excellent used condition exactly as advertised. Delivered very promptly in good strong packaging. Altogether a happy purchasing experience."


"Javid was really helpful, he sent loads of images to me as I couldn’t make up my mind as I was buying a gift. Extremely happy with it would definitely buy from him again."


Vintage Watch Specialist's Authenticity Guarantee

Guaranteed Authenticity

  • All of our watches are approved by our in-house authenticity check
  • Every watch is inspected meticulously by our experts
  • Any deviations from the original condition or specifications are listed

Worldwide shipping

  • Free UK shipping
  • Subsidised international shipping
  • All shipping tracked and insured

Warranty and Returns

  • All watches are covered by our free 12 month warranty (unless otherwise stated)
  • All watches are sold serviced and fully functioning (unless otherwise stated)
  • Please see our full warranty and returns policy here