Some specifications for this reference are on file; the record is incomplete.
Seiko · Prospex
Tuna
Ref. 6159-7010 — “Grandfather Tuna”
discontinuedFirst-generation professional 600mPartially documentedLast reviewed Not yet reviewed
Overview
- Nickname
- Grandfather Tuna
- Production
- 1975–1978
- Era
- First-generation professional 600m
- Status
- discontinued
Case
- Case diameter
- 51mm including shroud
- Case material
- Titanium monocoque with a stainless steel shroud
- Construction
- Monocoque titanium case — accessed from the front, with no removable caseback — inside a bolted outer shroud
- Bezel
- Unidirectional 60-minute
- Crystal
- Hardlex
- Crown
- Screw-down crown at 4
- Water resistance
- 600m, rated for saturation diving without a helium valve
Dial & Hands
- Dial
- Black
- Lume
- Tritium
- Lume type
- Tritium
Movement
- Movement
- Automatic
- Caliber
- 6159A
- Manufacturer
- Seiko (Suwa Seikosha)
- Winding
- automatic
- Frequency
- 36,000 vph
- Complications
- Day-date, hacking
Bracelet & Strap
- Strap options
- Vented polyurethane dive strap