SEIKO 6139-8050 JDM Speed-Timer

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.

Watch Details

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

Condition

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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