Sacred ground to nerds, a rathole to other people. This Seiko Tuna article is for most of us. The expectation is to give understanding into the historical backdrop of all expert Seiko Tuna models. Beginning with the 1975 reference 6159-7010 and getting done with the SBBN040 of today.

We’ve most likely completely knew about the expert jumping watches created by Seiko nicknamed ‘Tuna’. Also, we may know too that this wasn’t a given name from its introduction to the world. In light of the round and hollow state of the lugless watch packaging, its structure looked like a tuna can. It’s been said that the moniker came up forever and a day prior on one of the then scarcely any current Internet watch gatherings. I surmise it’s clear that the name has very little to do with the Tuna fish species, yet more with the tin where they for the most part end up in.

Meanwhile, the Seiko Tuna epithet sees an entire universe of various Seiko plunge watches. It’s absolutely not one watch we’re taking a gander at here, but rather considerably more an arrangement. Seiko Tuna is definitely not an authority model name, and this is the place where the mist kicks in, where we presently don’t see the forested areas for the trees.

The Grandfather Tuna, the primary relative the Golden Tuna, and the most recent off-spring the SBDX014G

A Bit Of Seiko Tuna History

Where to begin? Let’s just momentarily notice that Seiko has created looks for jumpers since 1965. Model 6217-8001, otherwise called 62MAS, saw the light with a 150M profundity rating and a turning jumpers bezel as Seiko’s first jumpers watch. You’ll discover Michael Stockton’s article on that watch here . In 1967/8 two refreshed forms, models 6215-010 and 6159-010, were even ready to withstand a 300M water column.

However, much the same as different makers, Seiko confronted inconvenience when these watches were utilized expertly for helium at incredible profundities. Jump watches passed their glass over during decompression. It called attention to that under high pressing factors the latent helium gas utilized could enter the watch through customary gasket developments. Developing pressing factor inside the watch, equivalent to the pressing factor outside of the watch at that profundity. At that point, while decompressing the jumper, the helium gas couldn’t get out rapidly enough, and in this manner the development pressure inside the watch made the glass blow off.

Saturation jumping explained

The Seiko Solution

At that time a few producers searched for an answer for get the compressed helium out of the watch rapidly enough during decompression. Not Seiko. Under the support of Ikuo Tokunaga Seiko decide to search for an answer with the goal that the helium couldn’t enter the watch, and no pressing factor was developed inside. Also, it was discovered, Seiko’s arrangement was found in an exceptional sort and development of the gasket, combined with a titanium monocoque packaging. In 1975 it was utilized without precedent for the Seiko 6159-7010 or model YAQ028.

Mr. Ikuo Tokunaga clarifying Seiko Professional jumpers watches during the 2015 Seiko Media Experience Tour ( click here for the full report ). Furthermore, the book (in Japanese language just) he expounded on this matter.

The first Seiko consolidating Seiko’s Tuna design

The Seiko 6159-7010 was a watch with a ton of firsts. It was Seiko’s first watch with a ‘professional’ profundity rating of 600M. It was the world’s first diver’s watch with a monocoque titanium case. It was the principal watch to include a two-layer case development with a titanium cover covered with earthenware for more noteworthy protection from stun. Another, accordion-style kind of lash was fitted, guaranteeing convenience by extending and contracting as the divers’ profundity changed. All things considered, more than 20 licenses were allowed to this, around then, progressive timepiece.

The Grandfather Tuna

As referenced over, the 6159-7010’s round and hollow state of the lugless watch packaging looked like a tuna can. The authoritatively named ‘Professional Diver 600’ would become the ‘Grandfather Tuna’. A watch which we at Fratello Watches all profoundly regard; Robert-Jan depicts the procurement of his Seiko Tuna 6159-7010 here .

Now we’re arriving at the point. We, and the perusers this article is intended to have a beginning stage. 1975, the absolute first Seiko Tuna. Inferring that there were more to come. Furthermore, that was what happened.

To decide our beginning stage fairly more decisively, I need to determine the fundamental components and details of which this first Seiko Tuna was made up from.

  • reference 6159-7010, model YAQ028, nickname Grandfather Tuna
  • large monocoque inward packaging, made of titanium, blanc steel bezel
  • 51mm barrel shaped defensive dark fired covered titanium cover dashed to the inward casing
  • hardlex crystal
  • automatic Seiko 6159, 25 gems, howdy beat (36.000/h) movement
  • 600M profundity rating
  • polyurethane strap

Important data on the off chance that you expect to peruse on

From this point onwards, I won’t go into pretty much equivalent looking Seiko jump watches which were introduced after the ‘Grandfather Tuna’, yet with lesser particulars. They justifiably may be scratched Tuna too, yet that’s on the grounds that these watches look equivalent. In fact they’re not. They don’t utilize a titanium monocoque packaging, and they’re not at any rate 600M waterproof. I think of them as commercial posterity which I don’t remember for this review. This article is about the – as I would like to think – genuine article Tuna, without being distracted.

7549-7009/PYF018

The first relative, the Golden Tuna

Let’s move ourselves to the furthest limit of the seventies. Mechanical programmed watch developments struggled, while new quartz innovation, giving a lot higher precision, was thumping on the entryway. Switzerland was resting and this new innovation came from Japan. Not amazing that, solitary three years after the fact in 1978, Seiko’s move up to their most expert watch was a 5 gems quartz development. The type number of this quartz development was 7549 thus the sort sign of the primary relative of the Grandfather Tuna became 7549-7009 or model PYF018.

Something else changed too however. To upgrade the surface properties of the watch’s inward titanium case, it was covered with Titanium nitride. Titanium nitride (TiN) is an amazingly hard fired material and has a brilliant appearance. Aside from the distinction in shading, the size changed too; it turned out to be roughly 2mm more modest in breadth. The ‘Golden Tuna’ was the following relative, which carries us to the accompanying specifications:

  • reference 7549-7009, model PYF018, nickname Golden Tuna
  • large monocoque inward packaging, made of TiN covered titanium, steel bezel gold colored
  • 49mm barrel shaped defensive dark fired covered titanium cover darted to the internal casing
  • hardlex crystal
  • quartz Seiko 7549, 5 gems movement
  • 600M pressure rating
  • polyurethane strap

Different case backs and inscriptions

The Next Real Offspring

As referenced, for clearness and straightforwardness I won’t incorporate a wide range of all around implied comparable looking models with lesser details. Consequently it required eight years before the following genuine posterity was conceived. Seiko figured out how to raise the pressing factor rating of the titanium monocoque ‘Professional Quartz Diver’ much further and concocted an astounding 1000M. Furthermore, the quartz development was completely patched up also and significantly better. The new type was the 7 gems 7C46, which made the watch the 7C46-7008 or model SBDS018. Since the vibes of the watch didn’t change a lot, the moniker remained ‘Golden Tuna’ too. The inward packaging was still TiN covered titanium, the cover dark fired covered titanium. It’s 1986 and we’re up to the accompanying determinations meanwhile:

SBDS018

  • reference 7C46-7008, model SBDS018, epithet Golden Tuna
  • large monocoque internal packaging, made of TiN covered titanium, steel bezel gold colored
  • 49mm tube shaped defensive dark clay covered titanium cover darted to the inward casing
  • hardlex crystal
  • high-quality quartz Seiko 7C46, 7 gems movement
  • 1000M pressure rating
  • polyurethane strap

 

For 13 years or thereabouts, it remained generally calm regarding the improvement of the genuine article Seiko Tuna. Obviously, some lesser siblings were conceived while Seiko had a go at actualizing some new methods in Tuna-like watches. An AGS (later named Kinetic) development saw the light in 1990, domed glass was actualized on a 300M model, and a Scubapro marked model introduced in 1999.

And Then A Golden-Tuna Re-issue

Then, in 1999 there was a re-issue of the 1000M ‘Golden Tuna’ model. It had reference number 7C46-7009 or model SSBS018. A re-issue ought to be viewed as another rendition of a pretty much same watch. It very well may be given with another reference number due to little specialized overhauls or slight stylish contrasts. The contrasts between the SSBS018 versus the SBDS018 must be found in the dial, the lash, and lettering looking into the issue back. All scarcely observable however, it stayed pretty much a similar watch. Here are it’s specifications:

SSBS018

  • reference 7C46-7009, model SSBS018, moniker Golden Tuna
  • large monocoque inward packaging, made of TiN covered titanium, steel bezel gold colored
  • 49mm barrel shaped defensive dark artistic covered titanium cover dashed to the inward casing
  • hardlex crystal
  • high-quality quartz Seiko 7C46, 7 gems movement
  • 1000M pressure rating
  • polyurethane strap

A Limited Edition Homage

One year later in 2000, there was extraordinary information. In the ‘Seiko Historical Collection, The Year 2000’ Seiko introduced a respect to the first 600M Grandfather Tuna. Also, as I would see it, it was done very right. It had a somewhat bigger breadth of 51mm of the first 6159-7010 once more (versus 49mm of later quartz relatives). Furthermore, there was a programmed development utilized again too. Not the very same development, notwithstanding, it was supplanted by the 8L35. A top notch programmed type got from Grand Seiko’s 9S55, yet deficient with regards to its design and fine-change. Indeed, even the brilliant or potentially dark bit of the quartz relatives was excluded, the praise had a blanc titanium monocoque packaging again.

The reference number of this praise was 8L35-0030, and the model sign was SBDX005. The dismal thing was that Seiko just delivered 1.000 bits of them. Here’s the rundown of specifications:

SBDX005

  • reference 8L35-0030, model SBDX005, nickname Historical Tuna, 1.000 numbered pcs.
  • large monocoque internal packaging, made of titanium, blanc steel bezel.
  • 51mm round and hollow defensive dark clay covered titanium cover dashed to the internal casing
  • hardlex crystal
  • automatic Seiko 8L35, 26 gems, 28.800/h) movement
  • 600M pressure rating
  • polyurethane strap

Darth Tuna – All Black

Another five years after the fact, in 2005, Seiko chose to innovative change and update the Tuna marginally. A dark DLC covered titanium inward packaging was utilized rather than the gold-shaded TiN. Besides, the gold DLC’d tempered steel bezel went dark also. Also, the gold-hued Philips screws, fixing the earthenware cover to the internal packaging, changed to dark hex fasteners. At last, interestingly, a sapphire precious stone was utilized rather than Seiko’s local Hardlex.

The all-dark appearance gave this watch its epithet ‘Darth Tuna’. What’s more, I surmise, on account of the all-dark round and hollow appearance, this watch may have been the first alluded to as ‘Hockey Puck’ as well. The official Seiko reference for this watch is 7C46-0AA0 or model SBBN011. Here are the specs to compare:

SBBN011

  • reference 7C46-0AA0, model SBBN011, nickname Darth Tuna
  • large monocoque inward packaging, made of DLC covered titanium, steel bezel dark DLC’d
  • 49mm barrel shaped defensive dark earthenware covered titanium cover darted to the inward casing
  • flat sapphire precious stone, ar-covered inside
  • high-quality quartz Seiko 7C46, 7 gems movement
  • 1000M pressure rating
  • polyurethane strap

A model we don’t know much about

It probably been after 2006, that a fairly fascinating, anyway very little thought about, TiN covered ‘Golden Tuna’ surfaced. Its reference was 7C46-0AB0 and it had model sign S23611J1. It turns out to be a lot of another re-issue of the 7C46-7009/SSBS018 re-issue introduced in 1999. It’s said also that this model was held for select deals in Taiwan, nonetheless, this still can’t seem to be affirmed. Determinations are referred to, they’re precisely equivalent to the last ‘Golden Tuna’ re-version. The dial appears to be changed, however and – referenced for the situation back – it sports a level sapphire crystal.

S23611J1

  • reference 7C46-0AB0, model S23611J1, epithet Golden Tuna
  • large monocoque internal packaging, made of TiN covered titanium, steel bezel gold-colored
  • 49mm round and hollow defensive dark ceramic covered titanium cover dashed to the internal casing
  • flat sapphire gem, ar-covered inside
  • high-quality quartz Seiko 7C46, 7 gems movement
  • 1000M pressure rating
  • polyurethane strap

Speeding Up

It was 2009 that Seiko introduced two new Tunas immediately. After just 4 years the SBBN011 ‘Darth Tuna’ was supplanted by the SBBN013, which in fact was the very same watch. Indeed, even the reference number didn’t change, 7C46-0AA0, similarly as its moniker ‘Darth Tuna’. What changed was the dial and the crown. The dial of the SBBN013 was stamped ‘Marine Master’, and the crown was endorsed with a ‘S’. This wasn’t the case with the SBBN011, for the rest, the watches are actually the equivalent. On the specialized side, it kept the level sapphire precious stone just as a fired cover. No news here, notwithstanding, I’ll list the specs to be complete:

SBBN013

  • reference 7C46-0AA0, model SBBN013, nickname Darth Tuna
  • large monocoque internal packaging, made of DLC covered titanium, dark steel bezel
  • 49mm tube shaped defensive dark clay covered titanium cover rushed to the inward casing.
  • flat sapphire gem, ar-covered inside
  • high-quality quartz Seiko 7C46, 7 gems movement.
  • 1000M pressure rating
  • polyurethane strap

 

The second new Seiko Tuna presented in 2009 was the 8L35-00C0, or model SBDX011. Indeed, this was the 8L35-0030 Limited Edition Homage ‘Historical Tuna’ fundamentally stylishly adjusted and brought out once more. The blanc titanium packaging of the ‘Historical Tuna’ got a dark PVD covering, and it became scratched the ‘Emperor Tuna’. As a specialized particular update, it got sapphire precious stone rather than a hardlex. Much the same as the SBBD013, with its moderately equivalent all-dark look, the 8L35-00C0 got ‘Marine Master’ imprinted on the dial. Writer Michael Stockton did a decent comparative article on the ‘Emperor Tuna’ here . Kindly discover its particulars below:

SBDX011

  • reference 8L35-00C0, model SBDX011, nickname Emperor Tuna
  • large monocoque inward packaging, made of DLC covered titanium, dark steel bezel
  • 51mm round and hollow defensive dark clay covered titanium cover darted to the inward casing
  • flat sapphire precious stone, ar-covered inside
  • automatic Seiko 8L35, 26 gems, 28.800/h) movement
  • 1000M pressure rating
  • polyurethane strap

Taiwan

Further to the bits of gossip about the second re-version of the ‘Golden Tuna’ (7C46-0AB0) in 2006, it appears to be that in 2011 a dark PVD covered reference 7C46-0AA0 ‘Darth Tuna’ (model S23619J1) was delivered explicitly focused on Taiwan also. The reference for the watch (7C46-0AA0) was equivalent to the SBBN011 and SBBN013, in fact the watch was similar as it also. The no one but distinction could be the battery change date imprinting looking into it back. As can be seen underneath, it had a marked crown like the SBBN013. While the SBBN013 had ‘Marine Master’ imprinted on the dial, the S23619J1 hasn’t, much the same as the SBBN011. I won’t notice specs here, as they are equivalent to the all around referenced ‘Darth Tunas’ before.

S23619J1

The 100th Anniversary of Seiko Watchmaking

Although the Seiko company was enrolled a couple of years longer, 2013 denoted the 100th commemoration of Seiko Watchmaking. To commend this commemoration, among other extraordinary watches, Seiko presented a Kinetic development controlled Tuna. Reference 5R65-0AJ0 or model SBDB008 . With its brilliant accents and 600M profundity rating, the watch had likenesses with the main ‘Golden Tuna’. It, in this way, is frequently alluded to as ‘Golden Spring Drive Tuna’.

However, I vowed not to list Seiko Tuna models which don’t comply with the plan rules and determinations of the first Seiko Tuna idea. Also, the ‘Golden Spring Drive Tuna’ doesn’t. Despite the fact that its case is made of titanium, it’s isn’t of monocoque development. It has a screw case back. Other than that, or most likely even thus, it has a domed sapphire precious stone rather than a level one. Demolishing the likeness to a tuna can.

SBDB008

The 5R65-0AJ0 ‘Golden Spring Drive Tuna’ was created in a restricted version of just 300 pieces, predominantly focused on the Japanese market. After one year in, 2014, similar model, yet on the whole dark without gold accents, came as model SBDB009 accessible to the remainder of the world. By and by it’s accessible as SBDB013.

Seiko Tuna Today

At the hour of composing, mid 2018, it’s effectively three years prior that Seiko brought us new Tuna models. In 2015, in any case, very some modernized models were presented. In the current worldwide assortment (which doesn’t mean all models ought to be accessible in your country) there are in any event two varieties of quartz driven models and two automatics. The SBBN025, SBBN027, SBDX01, and SBDX14.

Quartz-driven

To start with the quartz driven models. The reference 7C46-0AH0, model SBBD025, is a second present day translation of the in 1989 presented SBBN011 ‘Dart Tuna’. Same quartz development, same case measurements, same dark PVD covering of the monocoque case, same size. I surmise the moniker will become equivalent to well, nonetheless, it’s now and then seen as ‘New Darth Tuna’. What has changed a considerable amount are the hands. Most attractive is the new bolt molded hour hand and the straight moment hand. These sorts of hands can be found on numerous other Seiko Marine Master and Prospex jump observes these days too. It’s not the first run through changes were made to the hands of Seiko Tuna watches, notwithstanding, never was it that revolutionary. Right now Seiko changed from polyurethane ties to delicate silicone lashes also. A genuine bit of leeway as I would like to think. Here are the specs of the watch:

  • reference 7C46-0AA0, model SBBN025, nickname New Darth Tuna

  • large monocoque internal packaging, made of DLC covered titanium, dark steel bezel
  • 49mm tube shaped defensive dark fired cover rushed to the internal casing
  • flat sapphire precious stone, ar-covered inside
  • high-quality quartz Seiko 7C46, 7 gems movement
  • 1000M pressure rating
  • silicone strap

The Seiko Tuna SBBN027 model f.i. is actually precisely equivalent to SBBN025. The solitary contrast is style. The shade of the bezel decorate, dial, and the moment hand are yellow rather than high contrast. All things considered the presence of the current quartz Seiko Tuna is very unique in relation to the previous models, in fact, nonetheless, they’re not very far apart.

SBBN029, Limited Edition of just 700 pieces

The SBBN029 was an in fact equivalent model too, brought as a 700 pieces restricted release. Here are the overall particulars for the current SBBN models:

  • reference 7C46-0A(x)0, model SBBN02x

  • large monocoque inward packaging, made of DLC covered titanium, steel dark bezel with various decorate colors
  • 49mm barrel shaped defensive dark artistic cover dashed to the inward casing
  • flat sapphire gem, ar-covered inside
  • high-quality quartz Seiko 7C46, 7 gems movement
  • 1000M pressure rating
  • silicone strap

Automatics

The programmed Seiko Tuna, reference 8L35-00H0, model SBDX013 stylishly changed much more compared to its progenitor, the ‘Emperor Tuna’. With the exception of the hands, the dial changed radically too. The date window no longer dwells at 3 o’clock, it’s situated somewhere in the range of 4 and 5 at this point. A first in quite a while. For the rest here also, the specialized subtleties didn’t change a lot. Same programmed 8L35 development, same case measurements, same dark PVD covering of the monocoque case, same size.

  • reference 8L35-00H0, model SBDX013, nickname New Emperor Tuna
  • large monocoque inward packaging, made of DLC covered titanium, dark steel bezel
  • 51mm barrel shaped defensive dark clay cover dashed to the internal casing
  • flat sapphire gem, ar-covered inside
  • automatic Seiko 8L35, 26 gems, 28.800/h) movement
  • 1000M pressure rating of 1000M
  • silicone strap

The second model in the current Seiko Tuna programmed line up has a similar reference, 8L35-00H0. Actually precisely equivalent to the last mentioned, anyway here we discover an absolutely new element. Likely not referenced from the start sight, in any case, this is the principal Seiko Tuna of which the bezel tone is unique in relation to the (inward) packaging of the watch. Much the same as the SBDX013, the SBDX014 has a dark PVD covered titanium monocoque packaging. Nonetheless while at the 013 the bezel is dark PVD covered too, here with the SBDX014 the bezel has a rose gold tone. Promptly looking like the previous ‘Golden Tuna’, anyway being very extraordinary in fact.

  • reference 8L35-00H0, model SBDX014, epithet New Golden Tuna
  • large monocoque internal packaging, made of DLC covered titanium, steel bezel rose gold colored.
  • 51mm barrel shaped defensive dark fired cover darted to the inward casing
  • flat sapphire gem, ar-covered inside
  • automatic Seiko 8L35, 26 gems, 28.800/h) movement
  • 1000M pressure rating
  • silicone strap

What We Missed And What Will Be Next

It’s here that I need to specify that I deliberately excluded many Seiko Tuna models in this article. And afterward I’m not in any event, pointing at the numerous wannabes Seiko Tuna models with non-monocoque housings and lesser pressing factor rating. Notwithstanding, there were monocoque, high pressing factor evaluated, models around which you didn’t find in this article. They were for the most part unique restricted, or commemorative, versions focused on explicit worldwide territories. You’ll discover them named as White Dolphins, DIME MD version, and substantially more. Actually they’re presumably near proficient jumper Seiko Tuna’s, anyway shading shrewd extraordinary. Consequently for me excessively far off the first, and accordingly not the genuine article where this article is pointed at.

As 2018 marks the 40th commemoration of the primary ‘Golden Tuna’ – the reference 7549-7009 – I think it’s generally protected to expect that Seiko will carry a praise to this verifiably significant and notorious watch. The principal ‘Golden Tuna’ in 1978 was Seiko’s first quartz controlled proficient jumping watch. So I expect, and surely trust, the respect will be outfitted with the 7C46 quartz type. What I trust also is that Seiko regards the first profundity rating of the principal ‘Golden Tuna’, 600M. We will see, I expect Seiko will present the new models during the Baselworld reasonable, which is just a month of holding up away…

Addendum

Meanwhile, true to form and referenced above, Seiko introduced the 40th commemoration ‘Golden Tuna’ model as a Limited Edition of 1978 pieces. A great deal worked out positively, it has the adored and cheered 7C46 quartz type. It even has an old-type set of hands. The first enclosed file markers are back, there’s no cutting edge “Marine Master’ assignment in the dial, nor a Prospex logo on the crown. We don’t care a lot about the first Philips screws on the cover being supplanted with today’s hex-fasteners. However, what truly irritates is the profundity rating of the commemorative version. That ought to have been 600M, much the same as the first ‘Golden Tuna’ of 1978. However, unfortunately, Seiko decided for 1000M. Which without a doubt is the right evaluating of this watch, anyway not sufficient as the assignment for the 40th-commemoration restricted edition. Bluntly, presently it’s a re-version of the 1986 1000M appraised SBDS018.

 

  • reference 7C46-0AL0, model SBBN040
  • large monocoque inward packaging, made of DLC covered titanium, steel bezel gold colored
  • 49mm barrel shaped defensive dark fired cover dashed to the inward casing
  • flat sapphire gem, ar-covered inside
  • high-quality quartz Seiko 7C46, 7 gems movement
  • 1000M (Bummer!) pressure rating
  • silicone strap

Seiko Tuna References

The following models are referenced in this article:

– reference 6159-7010, model YAQ028 (1975)

– reference 7549-7009, model PYF018 (1978)

– reference 7C46-7008, model SBDS018 (1986)

– reference 7C46-7009, model SSBS018 (1999)

– reference 8L35-0030, model SBDX005 (2000)

– reference 7C46-0AA0, model SBBN011 (2005)

– reference 7C46-0AB0, model S23611J1 (2006)

– reference 7C46-0AA0, model SBBN013 (2009)

– reference 8L35-00C0, model SBDX011 (2009)

– reference 7C46-0AA0, model S23619J1 (2011)

– reference 7C46-0AA0, model SBBD025 (2015)

– reference 7C46-0AA0, model SBBD027 (2015)

– reference 8L35-00H0, model SBDX013 (2015)

– reference 8L35-00H0, model SBDX014 (2015)

– reference 7C46-0AL0, model SBBN040 (2018)

We’ve made very a few imagines ourselves for this article, others were taken from a few sources on the web, similar to gatherings, Instagram and Pinterest. In the event that anybody might want to be credited for one of the photos utilized, being his or hers, if it’s not too much trouble, let us know and we’ll glad to specify you. We don’t have any commercial reason in utilizing the photos, they’re only here for reference purposes.

For upgraded intelligibility, this article has been refreshed in January 2020. Specialized details on precious stones and lashes have been added, and the 40th commemoration model for the first ‘Golden Tuna’ as well.

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