Important Modern & Vintage Timepieces
Geneva, May 09, 2026
LOT 50
SEIKO, JAPAN, REF. 6159-7010, TUNA PROFESSIONAL 600, TITANIUM
CHF 1,000 - 2,000
HKD 10,000 - 19,900 / USD 1,300 - 2,600 / EUR 1,100 - 2,200 / JPY 202,000 - 404,000
A fine, very well-preserved, large, ceramic-coated titanium, self winding diver's wristwatch with date
| Grading System | |
|---|---|
Grade: AA |
Very good |
Case: 2 |
Very good |
Movement: 2* |
Very good Overhaul recommended, at buyer's expense |
Dial: 2-01 |
Very good HANDS Original |
Brand Seiko, Japan
Model Tuna Professional 600
Reference 6159-7010
Year 1975
Case No. 538801
Bracelet rubber Seiko strap with a titanium Seiko buckle
Caliber 6159, 25 jewels
Diameter 50
Signature dial, case and movement
Accessories original fitted box, hang tag
Notes
Launched in 1975, this early version of the "Tuna" diver's watch marked a new milestone in diver's watches. Measuring a large 50 mm in diameter, it was truly designed for underwater usage. Its ceramic coated titanium case was the world's first 600m titanium dive watch and its development resulted in more than 20 patents, this current example has been kept in close to new condition and has probably never been used for diving.
Provenance
Property of a Japanese collector