Tuna

Ref. 6159-7010 — “Grandfather Tuna”

discontinuedFirst-generation professional 600mPartially documentedLast reviewed Not yet reviewed

Lineage6159-70107549-7009 →Compare with next

Reference photography not yet on file

The original Tuna, and the only automatic one until much later. The 6159 is a high-beat 36,000 vph caliber — a demanding movement to service, and one whose parts are now scarce, which is why service history matters more on this reference than on almost any other Seiko.

Some specifications for this reference require verification against manufacturer documentation.

At a glance

Brand: Seiko
Collection: Prospex
Reference: 6159-7010
Production: 1975–1978
Caliber: 6159A
Case diameter: 51mm including shroud
Case material: Titanium monocoque with a stainless steel shroud

Related references

Same Collection

6105-8000 6105-8110 · Captain Willard 6105-8119 6217-8000 · 62MAS 6217-8001 · 62MAS 6306-7000 6306-7001 6309-7040 6309-7049 7002-7000 7549-7009 · Golden Tuna S23631 SARB017 SBBN007 SBBN015 · Marinemaster 300 Quartz SBBN017 SBBN031 SBBN033

Reference family timeline

Every generation in this lineage in production order. Spans are as documented; an open end means the reference is current or its end year is not established.

6159-7010“Grandfather Tuna”
Tuna · 6159A
1975–1978This reference
7549-7009“Golden Tuna”
Tuna · 7549
1978–1985
SBBN015“Marinemaster 300 Quartz”
Tuna · 7C46
2010–2016