The 1969 introduction of the Seiko Speedtimer was an important milestone in the history of the chronograph. It was one of the world’s first automatic chronographs, it featured a Calibre 6139 which signified a real advance in the history of the automatic wristwatch with its precision in elapsed time measurement.

Today, the newest generation of Speedtimer chronographs welcomes a series of three new creations whose design embodies the spirit of the original series but offer the added convenience, reliability, and accuracy of Seiko’s solar technology.

As is the case with all Speedtimer chronographs, every detail of this design reflects the precision required for elapsed time measurement at the highest level. The second hand extends right to the tachymeter markings at the dial edge whilst, the minute hand at six o’clock and the centre second hand are both in red so that the elapsed time stands out clearly against the dial. The date window is placed between the indexes so that the exact time can always be seen with ease.

All three watches are powered by Seiko’s solar Calibre V192 which offers a 60-minute chronograph, a 24-hour subdial and, when fully charged, operates for up to six months without being exposed to light. The combination of hairline and smooth finishes on the bracelet and the curved sapphire glass gives the watches a classic yet sports feel. The bracelet’s thickness and weight ensure stability and a high level of comfort on the wrist. The dials have a sunray finish which ensures the high level of legibility that is a core characteristic of every Prospex watch.

These three solar chronographs bring the high specifications of the Prospex Speedtimer to all who want the high precision of electronic timekeeping and the reliability and convenience of a watch that is powered exclusively by light.

Seiko Prospex Speedtimer Solar Chronographs: SSC911, SSC913, SSC915
• Calibre V192 Solar Chronograph
• 24-hour hand
• Power reserve indicator
• Solar charge
Specifications
• Stainless steel case and bracelet
• Curved sapphire crystal with anti-reflective coating on the inner surface
• Water resistance: 10 bar
• Magnetic resistance: 4,800 A/m
• Diameter: 41.4mm Thickness: 13.0mm
• Three-fold clasp with push button release
• Price: £590