Men's Watches

Seiko Tuna Part 3- More Features You Should Know



Hello everybody!! If you are still following our Seiko Tuna series, this is the perfect conclusion as we explore more features about it. If you are ready, then strap on your helmet and let’s go!!



Throughout the years, Seiko released many variations of the Tuna. A few examples of Tuna models can be seen below;

Seiko SBBN0033 (Source:

 Golden Tuna (Source:

Emperor Tuna (Source:

The Grandfather Tuna (Reference 6159-7010) is powered by the 6159b mechanical movement. Interestingly, the 6159b is based on the Grand Seiko 61xx movement, with a little bit of modification.

Caliber 6159b (Source:

The 6159b is a 25 jewel, high-beat mechanical movement, beating at 36,000 beats/hour. Subsequently, the 6159b were replaced with the modern 8L35 movement.




The Grandfather tuna comes with a deep set black dial and round markers for the hours and minutes. However, only the 12 o’clock position features inverted triangle markers.

Glow in the dark (

Seiko Tuna Dial (

On top of that, you can also see the word Seiko, Automatic and Professional 600m as well. Also, it has a nice date window at 3 o’clock position. Furthermore, later models come with a date window at the 4/ 5 o’clock position.

SNE499P1 (Source:

The most obvious details are in the hour and minute hands which glow in the dark. On top of that, the grandfather tuna is the only tuna with lollipop sweeping hands.

Suwa symbol (

Extra details can be seen with Suwa symbol on the dial, which tells you where the watch was manufactured. On top of that, most Seiko Tuna comes with Hardlex Mineral Crystal as shown below.

Hardlex crystal (



If you look at the back, you can find the iconic tsunami motif on its back. In fact, this is a standard for all Seiko Tuna as well.

Back of the case(

Other information you can see is the serial number, the material used (Titanium) and the reference number like 6159-7010.






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