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Seiko Tuna

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Seiko Grand Seiko Titanium 55.5mm Black
Seiko Grandfather Tuna REF: 6159-7010 TITANIUM 600 M
Rs. 379,008
Verified Dealer
8
UK
Seiko Marinemaster Titanium 48.2mm Black No numerals
Seiko Marinemaster 1000m "Emperor Tuna" with Custom leather...
Rs. 217,095
Verified Dealer
12
US
Seiko Marinemaster Titanium
Seiko Prospex Marine Master SBDB008 5R65 100th anniversary
Rs. 352,815
Free shipping
Verified Dealer
332
JP
Seiko Steel 51mm White No numerals
Seiko SBDY053 Frosty baby TUNA
Rs. 50,018
Free shipping
Verified Dealer
142
JP
Seiko Marinemaster Ceramic 48mm Black
Seiko Marine Master Automatic Professional "Emperor Tuna" -...
Rs. 324,890
Verified Dealer
71
MC
Seiko Marinemaster
Seiko Marinemaster
Rs. 205,288
Verified Dealer
855
US
Seiko Prospex Titanium 53.5mm Green
Seiko Prospex Gundam Mobile Suit Emperor Tuna Limited
Rs. 281,969
Verified Dealer
107
JP
Seiko Prospex Steel 47,8mm Black No numerals
Seiko Prospex Diver Solar Tuna SNJ028 Arnie
Rs. 34,113
Verified Dealer
1626
DE
Seiko Marinemaster
Seiko Tuna Marinemaster 300
Rs. 94,047
Private Seller
 
HU
Seiko Marinemaster Steel 47.7mm Black
Seiko Marine Master Professional 300M Tuna SBBN031 - SBBN031
Rs. 82,191
Free shipping
Verified Dealer
2570
US
Seiko Titanium 50mm Black
Seiko Platinum Tuna "MM1000" SBBN029 on grey leather (RARE)
Rs. 236,139
Verified Dealer
12
US
Seiko Marinemaster Titanium
Seiko Marinemaster Prospex Professional 1000m 8L35-00H0 Automatic
Rs. 175,699
Free shipping
Verified Dealer
332
JP
Seiko Prospex Steel 53,5mm Green No numerals
Seiko SBDX027 GUNDAM EMPEROR TUNA Prospex Limited Edition
Rs. 315,266
Free shipping
Verified Dealer
142
JP
Seiko Marinemaster Titanium 53mm Black No numerals
Seiko Marinemaster
Rs. 188,009
Verified Dealer
27
DE
Seiko Marinemaster
Seiko Marinemaster
Rs. 228,140
Verified Dealer
855
US
Seiko Titanium 49mm Black No numerals
Seiko Golden Tuna 7c46 7009
Rs. 158,170
Verified Dealer
466
ES
Seiko Prospex Steel 51,7mm Black No numerals
Seiko Prospex TUNA SRPA82J1 JDM Made in Japan Gold Tone...
Rs. 40,611
Verified Dealer
100
ES
Seiko Marinemaster Steel 48mm Black No numerals
Seiko Tuna Marinemaster SBBN031 -NEW- EU import tax free
Rs. 128,161
Private Seller
 
ES
Seiko Marinemaster Steel 47.70mm Black
Seiko Prospex Divers Marinemaster 300 Ninja Tuna - SBBN035
Rs. 66,957
Free shipping
Verified Dealer
2570
US
Seiko Titanium 50mm Black
Seiko "Platinum Tuna" MM1000 SBBN029 on metal (RARE)
Rs. 220,904
Verified Dealer
12
US
Seiko Titanium
Seiko Professional Diver 1000m SSBS018 7C46-7008 Quartz
Rs. 140,276
Free shipping
Verified Dealer
332
JP
Seiko Marinemaster Titanium 49,4mm Black No numerals
Seiko SBBN029 Prospex Marinemaster TUNA Limited Edition
Rs. 152,320
Free shipping
Verified Dealer
142
JP
Seiko Marinemaster Steel 51mm Black
Seiko Marine
Rs. 147,360
Verified Dealer
 
JP
Seiko Prospex
Seiko Prospex Darth Tuna
Rs. 156,156
Verified Dealer
855
US
Seiko Marinemaster Steel 48mm
Seiko Marinemaster 300 Tuna SBBN031 Diashield
Rs. 143,208
Verified Dealer
388
DE
Seiko Marinemaster Steel 47.70mm Black
Seiko Prospex Divers Marinemaster 300 Ninja Tuna - SBBN035
Rs. 63,566
Verified Dealer
836
JP
Seiko Prospex Steel 42mm
Seiko Prospex STBR025 Mini Tuna
Rs. 18,809
Private Seller
 
ES
Seiko Marinemaster Titanium 49.4mm
Seiko Prospex Sea Marine Master SBBN025 - SBBN025
Rs. 129,419
Free shipping
Verified Dealer
2570
US
Seiko Prospex
Seiko PROSPEX BABY TUNA SRP637 NEW
Rs. 43,800
Free shipping
Verified Dealer
146
US
Seiko Marinemaster 52mm Black
Seiko プロスペックス マリーンマスター プロフェッショナル SBDX014 8L35-00H0
Rs. 168,614
Verified Dealer
20
JP
Seiko Marinemaster Titanium 49.4mm Black No numerals
Seiko SBBN025 Marinemaster Darth TUNA
Rs. 150,194
Free shipping
Verified Dealer
142
JP
Seiko Marinemaster Titanium 48mm Black
Seiko Marinemaster
Rs. 302,097
Free shipping
Verified Dealer
1786
SE
Seiko Prospex 50mm Blue No numerals
Seiko International Edition Prospex Tuna Sondermodell - Ref....
Rs. 76,948
Verified Dealer
426
DE
Seiko Prospex Steel 45mm Black No numerals
TOP
Seiko Black Monster Baby Tuna Prospex Men's Watch SRP637K
Rs. 32,679
Verified Dealer
78
PH
Seiko Marinemaster Steel 47.7mm Black
Seiko Marine Master Professional 300M Tuna SBBN031 - SBBN031
Rs. 82,522
Verified Dealer
836
JP
Seiko 48mm
Seiko Divers Professional 600m Golden TUNA
Rs. 136,368
Private Seller
 
ES
Seiko Marinemaster 52.4mm Black
Seiko Marine Master Professional SBDX014 - SBDX014
Rs. 240,633
Free shipping
Verified Dealer
2570
US
Seiko Prospex Steel Black
Seiko "Arnie" Prospex Tuna Dive SNJ025 ( NEW )
Rs. 32,755
Free shipping
Verified Dealer
146
US
Seiko Grand Seiko Titanium 55.5mm
Seiko 6159-7010 Grandfather Tuna
Rs. 418,956
Private Seller
 
AU
Seiko Grand Seiko Titanium 50mm
Seiko Grandfather Tuna Professional 600m 6159-7010
Rs. 632,681
Private Seller
 
ES
Seiko Grand Seiko 50.5mm
Seiko 6159-7010 Grandfather Tuna
Rs. 266,608
Private Seller
 
HK
Seiko Marinemaster Titanium 52mm Black No numerals
Seiko Marinemaster 1000m
Rs. 208,715
Private Seller
 
UK
Seiko Prospex Steel 46.5mm
Seiko Prospex Solar Tuna Dive Watch 200m
Rs. 29,327
Private Seller
 
US
Seiko 49mm
Seiko Golden Tuna 7549-7000 JDM Version - 1978 Original
Rs. 179,545
Private Seller
 
NL
Seiko Marinemaster Titanium 49,6mm Black No numerals
Seiko SBDB013 Prospex Marinemaster Springdrive
Rs. 245,837
Free shipping
Verified Dealer
142
JP
Seiko Prospex Ceramic
Seiko Prospex Tuna green sea turtle limited edition 1881 pcs
Rs. 85,497
Private Seller
 
BE
Seiko Marinemaster 52.4mm Black
Seiko Marine Master Professional SBDX013 - SBDX013
Rs. 199,004
Verified Dealer
836
JP
Seiko Marinemaster Black
Seiko Marine Master Professional SBBN027 - SBBN027
Rs. 130,943
Free shipping
Verified Dealer
2570
US
Seiko Marinemaster Steel 47,5mm Black No numerals
Seiko “Tuna” Marinemaster SSBN031
Rs. 128,246
Private Seller
 
ES
Seiko Prospex Steel Black
Seiko Prospex Automatic Divers 200M Yellow Fin Baby Tuna
Rs. 26,216
Verified Dealer
298
SG
Seiko Titanium 49mm Black
Seiko Golden Tuna 1978 Professional Diver`s 600 m "James Bond...
Rs. 162,445
Verified Dealer
138
AT
Seiko Marinemaster Titanium 53.5mm Black No numerals
Seiko Prospex Marine Master SBDX014 (New)
Rs. 190,434
Private Seller
 
HK
Seiko Prospex Steel 46.5mm Black
Seiko Prospex Solar Tuna Dive Watch 200m
Rs. 29,327
Private Seller
 
US
Seiko Marinemaster Titanium 49,4mm Black No numerals
Seiko SBBN027 Marinemaster Professional Prospex 1.000 m.
Rs. 134,608
Free shipping
Verified Dealer
142
JP
Seiko Titanium 50mm
Seiko Tuna Professional 600 very rare vintage diver watch
Rs. 662,776
Free shipping
Verified Dealer
22
FR
Seiko Marinemaster 52.4mm Black
Seiko Marine Master Professional SBDX014 - SBDX014
Rs. 195,454
Verified Dealer
836
JP
Seiko Marinemaster 50.7mm
Seiko Prospex Marine Master Professional - SBDB013
Rs. 224,636
Free shipping
Verified Dealer
2570
US
Seiko Prospex Steel Black
Seiko Prospex Tuna Dive Watch Solar 200m
Rs. 31,155
Free shipping
Verified Dealer
146
US
Seiko Prospex Steel Blue No numerals
Seiko PROSPEX Japan Exclusive DEEP BLUE BABY TUNA SBDY055
Rs. 51,896
Verified Dealer
48
HK
Seiko Prospex Titanium 49.4mm Black
Seiko マリーンマスター プロフェッショナル
Rs. 94,084
Verified Dealer
21
JP
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Seiko Tuna: A Distinctive Diving Watch for Pros

The Seiko Tuna series contains tool watches for professional divers. Top models are water-resistant to 100 bar (1,000 m, 3,280 ft). The distinctive outer case gives the Tuna its name and makes it a popular collector's item.


5 Reasons to Buy a Seiko Tuna

  • A professional diving watch with a unique "tuna can" design
  • Top models water-resistant to 1,000 m (100 bar, 3,280 ft)
  • High-precision quartz, automatic, or Spring Drive calibers
  • Coveted collector's items
  • Interesting models with robust titanium cases

An Impressive Tool Watch for Exploring the Deep

The Seiko Tuna is a series of professional diving watches that have been in production since 1975. Of course, "Tuna" is not this timepiece's official name. Instead, this moniker comes from Seiko's fan community, who recognized the resemblance between this watch's distinctive outer case and a can of tuna. Some collectors lovingly refer to these timepieces as "hockey pucks" since most have black cases and are up to 52 mm in diameter.

Every Tuna model has a large outer case that is attached to the actual case by four screws. It reaches up past the unidirectional diving bezel and protects the bezel and case against strong impacts. The wearer can operate the bezel via openings on either side of the outer case, which expose a section of the bezel's toothed edge.

Seiko has been crafting these timepieces out of titanium since the very first model, known as the Grandfather Tuna. Only a few of the more affordable models are made of stainless steel and, in some instances, have a plastic outer case. These editions tend to have lower water resistances. While some titanium versions can survive up to 100 bar (1,000 m, 3,280 ft), the stainless steel editions are water-resistant to a maximum of 20 bar (200 m, 656 ft).

Seiko equips most models with stripped-down Grand Seiko calibers. However, there are also watches with high-quality quartz, kinetic, or Spring Drive movements.


How much does the Seiko Tuna cost?

Model/Reference number Price (approx.) Caliber
Grandfather Tuna, ref. 6159-7010 7,100 USD 6159A high beat
Spring Drive Tuna, ref. SBDB008 4,400 USD 5R65 Spring Drive
Emperor Tuna (2015), ref. SBDX013 3,600 USD 8L35 automatic
Emperor Tuna Rose Gold, ref. SBDX014 2,400 USD 8L35 automatic
Emperor Tuna, ref. SBDX011 2,300 USD 8L35 automatic
Golden Tuna, ref. SBDS018 2,100 USD 7C46 quartz
Darth Tuna, ref. SBBN011 2,000 USD 7C46 quartz
Arnie, ref. H558-5000 1,100 USD H558 quartz
Solar Arnie, ref. SNJ025 550 USD H851 quartz

The Grandfather Tuna and Its Grandchildren

Many collectors consider the Grandfather Tuna ref. 6159-7010 their personal holy grail. This timepiece debuted in 1975 and was sold outside of Japan under the reference numbers 6159-7009 and 6159-7019. Seiko created this watch to serve as a tool for professional divers. They were also the first manufacturer to craft a diving watch out of titanium. This light yet robust material is used for both the inner case as well as the massive outer shell, which is coated in scratch-resistant black ceramic.

The final 51-mm watch is water-resistant to 600 m (60 bar, 1,969 ft) and suitable for saturation diving. Instead of using a conventional helium escape valve, Seiko turned to their proprietary L-shaped glass seal. Unlike rubber seals, Seiko's version prevents helium molecules from entering the watch in the first place. This means the glass won't pop out during decompression as a result of helium trying to escape.

As a professional diving watch, the Grandfather Tuna has large, easy-to-read indices and hands that are coated with a generous amount of luminous material. Other features include a unidirectional diving bezel, a date display at 3, and a crown at 4 o'clock. The high-beat caliber 6159A ticks away inside this timepiece at a rate of 36,000 alternations per hour (A/h). Expect to pay around 7,100 USD for this watch.

If the Grandfather Tuna costs a bit too much for you, there are a number of good and affordable alternatives. These include the Emperor Tuna SBDX011 from 2009, as well as the Emperor Tuna Rose Gold SBDX014 and the new Emperor Tuna SBDX013 from 2015. All three share their case design with the original and are also made of titanium. However, unlike their famous predecessor, these models are water-resistant to 1,000 m (100 bar, 3,280 ft) and powered by the automatic caliber 8L35. This movement has a balance frequency of 28,800 A/h and is based on the Grand Seiko caliber 9S55. You'll find these timepieces in the Marinemaster collection. Never-worn editions sell for between 2,400 and 3,600 USD, while pre-owned pieces change hands for as little as 2,200 USD.


Prices for the Golden Tuna and Darth Tuna

Golden Tuna watches are direct descendants of the Grandfather Tuna. These models set themselves apart with their golden inner case, bezel, and crown. Their golden hue comes from a layer of titanium nitride (or TiN). The earliest Golden Tuna model premiered in 1978. It has the reference number 7549-7009 and is water-resistant to 600 m (60 bar, 1,969 ft). The quartz caliber 7549 powers this timepiece and provides it with a day-date display at 3 o'clock. You can call this watch your own for roughly 1,600 USD.

At 2,100 USD, the Golden Tuna SBDS018 from 1986 is slightly more expensive. However, the price increase is justified by this timepiece's 1,000 m (100 bar, 3,280 ft) of water resistance and more modern quartz caliber 7C46. Seiko re-released this watch in 1999 under the reference number SSBS018. Both models are nearly identical but for a few minor differences on the dial and the text on the case back.

Known as Darth Tuna, the ref. SBBN011 also gets its power from the caliber 7C46 and can survive depths of up to 1,000 m (100 bar, 3,280 ft). Instead of a golden layer of TiN, Seiko coats this watch in a layer of black DLC. This solid-black color scheme reminded Seiko's fan community of Star Wars villain Darth Vader, and the moniker quickly stuck. Prices for well-maintained pieces range from 1,300 to 2,000 USD.


Buying the Tuna with a Spring Drive Caliber

In recent decades, Seiko has earned a reputation as a pioneer of new caliber technologies. One of the most notable examples of this is the Spring Drive. These movements combine the best of mechanical and electronic watchmaking. The easiest way to identify one of these movements is the extremely fluid glide of the second hand around the dial.

One of these movements, namely the 5R65 with a 72-hour power reserve, made its way into the Marinemaster collection in 2013. It appears in the SBDB008 or, as fans call it, the Spring Drive Tuna. Seiko only produced 300 copies of this watch. It is water-resistant to 600 m (60 bar, 1,969 ft) and has the same golden TiN-coated inner case as the Golden Tuna. The outer shell is covered in a layer of gray DLC. Interestingly, the inner case of this watch isn't one solid piece like the other Tuna models. Instead, it has a screw-down case back. Thanks to its Spring Drive caliber, this timepiece also has a power reserve indicator on its dial at 9 o'clock.

Plan to spend around 4,400 USD on this rare collector's item. Alternatively, you may also enjoy the SBDB009 from 2014. This model has the same technology as the limited edition but is in series production and has a solid black color scheme. Prices for this model sit at about 3,800 USD.


An Affordable Alternative: The Seiko Arnie

In the early 1980s, Seiko produced several affordable alternatives to the Tuna. One such timepiece bears the reference number H558-5000. This watch is often called "Arnie" since none other than Arnold Schwarzenegger himself wore one of these timepieces in multiple movies, including Predator, Running Man, and Twins.

"Arnie" follows the same basic design principles as the Tuna but has a much smaller 45-mm case. It also has a stainless steel inner case and a plastic outer shell. The quartz caliber H558 ticks away inside this timepiece and lends it both an analog time display as well as a digital LCD one. The digital portion can also serve as an alarm, chronograph, or GMT display. The Seiko H558-5000 Arnie is beloved among collectors and requires an investment of roughly 1,100 USD.

Seiko announced an updated version of the Arnie at Baselworld 2019: the Prospex SNJ025 Solar . The quartz caliber H851 boasts the same functionality as the original Arnie but gets its power from the sun. What's more, the case has grown slightly to 48 mm in diameter. At only 550 USD new, this watch is among the most affordable members of the Tuna family.


The Origin of the Seiko Tuna

In 1968, Seiko received a letter from a professional diver. In it, he explained that the manufacturer's watches weren't suited for the extreme conditions experienced deep under water. He described how his watches broke either under high pressure or as helium tried to escape during decompression.

Seiko took the letter seriously and gathered a team to develop a proper professional diving watch. Almost seven years and 20 patents later, lead developer Ikuo Tokunaga presented the Tuna to the world. It was a tool watch in every sense of the term and was fit for saturation diving despite its lack of a helium escape valve.