Some specifications for this reference are on file; the record is incomplete.
Seiko · Vintage
Chronograph 6139
Ref. 6139-6000
discontinuedFirst-series 6139-600xPartially documentedLast reviewed Not yet reviewed
Authentication Notes
Combination
MediumProbable
Dial wording and caseback wording should agree
'Proof' on the dial with 'Resist' on the caseback (or the reverse) means one of the two has been replaced. That is usually a service dial and is an originality finding, not evidence of a counterfeit — but it should be recorded, because the same mismatch is what a parts watch assembled from two donors also produces.
Inspection points
No inspection checklist has been published for this reference.