Some specifications for this reference are on file; the record is incomplete.
Seiko · Vintage
Chronograph 6138
Ref. 6138-0011 — “UFO”
discontinuedLugless 'Yachtsman' casePartially documentedLast reviewed Not yet reviewed
Missing informationCore fields not yet documented for this reference: Case diameter, Water resistance
Reference photography not yet on file
Seiko's own name for this case is 'Yachtsman'; 'UFO' is a collector nickname earned by the lugless case appearing to float on the wrist. Both names are in wide use and neither is wrong, but only one of them is Seiko's.
Some specifications for this reference require verification against manufacturer documentation.
At a glance
- Brand
- Seiko
- Collection
- Vintage
- Reference
- 6138-0011
- Production
- 1970–1979
- Caliber
- 6138B
- Case material
- Stainless steel
Related references
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.
- 1970–1979This reference
- 1971–1978
- 1972–1978
- 1976–1979