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Seiko

Seiko 5 Sports Speed-Timer 6139-7012

Seiko 5 Sports Speed-Timer 6139-7012

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Brand

seiko

Diameter

41mm

Model

Chronograph

Year

1970 - 1979

Reference

6139-7012

Water resistant?

No

Movement

Automatic

Case material

Steel

Specifications

Caliber 6139

Made in 1975

Approximate dimensions:

- 39mm (case without crown)

- 42mm (between claws)

- 19mm (bracelet fitting)

- 14mm (thickness)

Description

Vintage piece in excellent condition, showing small signs of use and time

Watch only, no original box or documentation

Steel bracelet for wrists up to approximately 18cm, with extender

Learn more

The Seiko 6139-7012 Speed-Timer is the kind of watch that draws attention effortlessly. The “tonneau”-shaped case, with its rounded, robust lines, perfectly captures the spirit of the seventies, delivering a strong presence on the wrist and a unique look.

The black dial offers a beautifully executed sporty contrast, with white details and an orange central hand that adds even more character to the overall design. The tachymeter scale on the rehaut reinforces the racing theme, while the single subdial and day-date window at 3 o’clock keep it simple and functional—exactly as a good chronograph should be.

At its heart is the legendary 6139 automatic caliber, one of the world’s first automatic chronographs, featuring a column-wheel and vertical clutch—a technical milestone for Seiko that remains impressive to this day. Robust, reliable, and steeped in history, it is a movement that raised the bar for Japanese watchmaking in its time.

Paired with a racing-style leather strap, this piece gains even more charm and versatility. A watch with a sporty DNA, a significant history, and iconic design—perfect for anyone seeking an authentic vintage piece with presence and personality.

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Quality

We certify that all watches have been previously evaluated and tested by experienced watchmakers we trust. Therefore, all pieces advertised are authentic and in full working order.

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