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Solar

DIAL TYPE

STRAP TYPE

 watch movement 

CASE material

Stainless Steel

Speed Timer

Steel

STORY

In the 1960's, Seiko announced itself on the international sports timing stage with a whole new generation of high-precision equipment that was enthusiastically endorsed by many international sports federations and used to capture elapsed time at many of the world's leading sports events. Central to this success was a range of stopwatches that incorporated Seiko's innovative "heart-shaped cam" mechanism, a feature which delivered a level of precision once thought unachievable by manual sports timing devices. Then, in 1969, Seiko introduced the Seiko Speedtimer with the innovative Caliber 6139. It was the world's first automatic chronograph with a column wheel and vertical clutch, two devices that delivered real improvements in the measurement of elapsed time in a wristwatch and are still a prerequisite in high functionality chronographs.
Today, A new series inspired by the Speedtimer and Seiko's rich and continuing tradition of sports timing join the Prospex collection.

 Prospex  COLLECTION

★ ★ ★ ★ ★  (479 )

The Seiko Prospex Speedtimer SSC939P1 is a luxurious sports chronograph watch powered by light energy. Part of the Seiko Prospex Speedtimer collection, first launched in 1969 – an era of fashion, music, and motorsports – the Speedtimer boasts a powerful design inspired by classic muscle cars cruising the endless highway.

SSC939P1 

1000 Bth

Case Back

The case back is adorned with an original illustration of the winning rally car, Datsun 240Z.
The words "LIMITED EDITION" and the serial number are applied on the case back.

Seiko Prospex Speedtimer
Solar Chronograph
Datsun 240Z Limited Edition

SSC957

24-08-2024

Exploring new possibilities in watch design,
Seiko introduces the power design project collection.

In 2022, Seiko’s design team revived the “power design project,” an initiative that originally ran from 2001 to 2009. This internal program was conceived to encourage Seiko’s in-house designers to explore design possibilities in a way distinct from their usual style of work. While the power design project aims to spark fresh creative thinking with an element of fun and surprise, it is, at its core, an extension of the pioneering spirit already present in Seiko’s rich archive, where breakthroughs in both design and technology have long defined the brand’s watchmaking legacy....

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10-10-2025

<Seiko Presage> The 4th installment of the special page “The Presage Museum” is now available.

What is Japanese “functional beauty,” and how does it endure in our everyday lives?
This question lies at the heart of the Seiko Presage Classic Series of watches, born from the concept of “gracefully
wearing Japanese beauty.” With refined mechanical movements and designs inspired by Japanese “functional beauty,”
this series honors the essence of craftsmanship. The Presage Museum, as a companion to the series, provides a
platform to explore how Japan’s unique sense of beauty is...

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24-08-2024

Important Notice regarding Counterfeit and Modified SEIKO watches

It has come to our attention that several online sellers, including those operating on auction sites, online marketplaces, and social media platforms, are offering counterfeit watches for sale. These are sometimes indistinguishable from genuine products. There are also scam websites where sellers promote products by using images of SEIKO watches, but no product is delivered to the customer even after they pay.
Some online sellers are using the SEIKO logo to pretend to be an authorized parts...

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