Blue Dial JDM Chronograph — 1974
One of the two dial variations of the Seiko 5 Sports Speed-Timer 6139-8050, featuring the highly desirable blue dial.
Manufacturer
Seiko
Model
Seiko 5 Sports Speed-Timer 6139-8050
Movement
Seiko 6139B Automatic Chronograph
Case Size
40 × 42 mm
Production Date
November 1974
Bracelet
Leather
Service
Full service in December 2024
The watch received a full service in December 2024 and runs reliably. Timegrapher results are available for reference and show solid performance.
This example is currently fitted in the slightly larger 6139-8002 case, which gives the watch a somewhat stronger presence on the wrist.
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