SEIKO 6139-7020 JDM Speed-Timer

Black Dial JDM Chronograph — 1971

One of the three dial variations of the Seiko 5 Sports Speed-Timer 6139-7020.

Watch Details

Manufacturer
Seiko

Model
Seiko 5 Sports Speed-Timer 6139-7020

Movement
Seiko 6139B Automatic Chronograph

Case Size
41 × 46 mm

Production Date
December 1971

Bracelet
Original Seiko bracelet, reference XGA141

Service
Full service in October 2024

Condition

The watch remains in excellent vintage condition and received a full service in October 2024. It runs reliably, and timegrapher results are available for reference.



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