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The Calibre 8R Series.

Designed for maximum precision 
in every aspect.

All watches are powered by the calibre 8R series, the brand’s most advanced automatic chronograph movement for mechanical watches. This calibre incorporates both vertical clutch and column wheel mechanisms which ensure the precision and durability. The escapement is lightweight and strong, thanks to the use of MEMS technology which enhances the stability of the watch's precision. With the push of the reset button, the hands return back to zero instantly and in perfect synchronisation.

Caliber 8R46

This calibre is designed and hand assembled completely in-house by Seiko's most skilled watchmakers.

SPEEDTIMER Mechanical Chronograph SRQ047

Photo of SPEEDTIMER Mechanical Chronograph Photo of SPEEDTIMER Mechanical Chronograph

Finding inspiration in Seiko’s heritage, a new Speedtimer mechanical chronograph design is born in Prospex. The creation captures the character of a celebrated Speedtimer design from 1972.

  • Case & Bracelet

    The new case and bracelet are produced using Seiko’s latest watchmaking technologies to create a classic and refined construction. The case feature vertical hairline finishing, and the bracelet is designed for comfort on the wrist.

SPEEDTIMER Mechanical Chronograph SRQ055

Photo of SPEEDTIMER Mechanical Chronograph Photo of SPEEDTIMER Mechanical Chronograph

An authentic sports chronograph is now available
with a dial bearing the historic “SPEEDTIMER” name and a tachymeter bezel.

  • Bezel

    This automatic chronograph features a tachymeter scale located on the outer bezel for enhanced legibility and a sporty aesthetic. This scale also combines the function to measure speeds from 50km/h to 60 km/h, paying homage to the original Speedtimer bezel format from 1969.

SEIKO PROSPEXSPEEDTIMER
Mechanical Chronograph