Pre-Owned
Seiko

Seiko 'Grandfather Tuna'

6159-7010 51 mm
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Regular price $5,795
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    Seiko 'Grandfather Tuna' - (Ref. 6159-7010) Product Details

    Overall Condition: Good condition overall. Case shows moderate wear. Indices show even patination. Possible service handset.

    Seiko's Tuna dive watches are known by the nicknames of "Baby Tuna," "Golden Tuna" and "Grandfather Tuna," but they could also be known as "big," "bigger," and "biggest." But rather than being big simply for the sake of it, the size of the Tunas has functionality at its heart.

    Seiko had released its first dive watch in 1965, the Reference 6217 (or 62-MAS). The 62-MAS was water-resistant to 150 meters and had a rotating bezel, luminous hour markers, and a 17-jewel movement (Calibre 6127) with a beat rate of 18,000. It was an excellent effort, competitively-priced compared to Swiss divers, but for Seiko, it was only the beginning.

    In 1968, a letter from a disgruntled professional diver in Hiroshima led to a seven year odyssey that resulted in the creation of the Tuna series of dive watches, the first ever designed specifically for saturation diving.

    A team of engineers led by Ikuo Tokunaga devised a circular, titanium one-piece or monocoque case with a special "L type" gasket, surrounded by a titanium shroud coated with ceramic. The crystal was held in place with a locking ring. This eliminated the need for a Helium Escape Valve, resulting in a watch that--released in 1975-looked entirely different from any dive watch that had been released.

    The Reference 6159-7010 was the first in a lineage of "Tuna" divers with hockeypuck aesthetics built for one purpose: never to fail. Packing 600M of water resistance, the overbuilt dive masterpiece inspired the full lineage of Tuna models which are today some of the most well-regarded in the history of dive watches.

    This Reference 6159-7010 "Grandfather Tuna" remains in truly clean condition with a beautifully patinaed tritium dial waiting for its next custodian.

    General

    Condition

    Pre-owned

    Brand

    Seiko

    Reference

    6159-7010

    Year

    1970s

    Family

    Grandfather Tuna

    Product Code

    40992972

    Watch Display

    Analog

    Case

    Case Size

    51 mm

    Case Material

    Titanium

    Lug Width

    22 mm

    Dial

    Dial Color

    Black

    Movement

    Type

    Automatic-winding

    Bracelet

    Bracelet Material

    Rubber

    102

    Years of Service in Luxury Timepieces

    2000+

    Five Star Reviews

    191

    Showrooms Across the Globe

    50+

    Luxury Timepiece Brands


    As Featured In

    Hodinkee