Some specifications for this reference are on file; the record is incomplete.
Seiko · Vintage
Chronograph 6138
Ref. 6138-0030 — “Bullhead”
discontinuedTop-pusher 'Bullhead' casePartially documentedLast reviewed Not yet reviewed
Missing informationCore fields not yet documented for this reference: Case diameter, Water resistance
Overview
- Nickname
- Bullhead
- Production
- 1971–1978
- Era
- Top-pusher 'Bullhead' case
- Status
- discontinued
Case
- Case material
- Stainless steel
- Construction
- Asymmetric case with the crown and both chronograph pushers on the upper flank, giving the 'bull horns' silhouette
- Bezel
- Fixed outer bezel with tachymeter
- Crystal
- Hardlex
- Crown
- Crown and pushers at the top of the case
Dial & Hands
- Dial
- Reddish-brown or black depending on variant
- Lume
- Tritium
Movement
- Movement
- Automatic chronograph
- Caliber
- 6138B
- Manufacturer
- Seiko
- Winding
- automatic
- Frequency
- 21,600 vph
- Complications
- Chronograph (30-minute and 12-hour totalisers), day-date