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Stainless steel solar chronograph with blue dial and three black subdials

Seiko

Seiko SSC931 Prospex Speedtimer U.S. Special Edition Solar Chronograph 41.4 mm Blue Dial

SKU CH-0G3W-K16JJ

Solar-powered chronograph with 60-minute 1/5-second timing, split function, 6-month reserve, 100 m water resistance, and curved sapphire crystal

  • Solar power eliminates battery changes with six-month reserve
  • Chronograph measures 60 minutes in 1/5-second increments with split function
  • 10 bar water resistance suits swimming and snorkelling to 100 metres
  • Curved sapphire crystal with anti-reflective coating protects the dial
  • LumiBrite hands and markers ensure legibility in darkness

Seiko SSC931 Prospex Speedtimer U.S. Special Edition

This Seiko Prospex Speedtimer U.S. Special Edition is a solar chronograph watch designed for adventure and vintage racing style. It features a 41.4 mm stainless steel case with a curved sapphire crystal and a vivid blue dial framed by a black tachymeter ring. The watch offers 10 bar water resistance and a tri-fold push button release clasp on a 21 mm lug width.

Solar power replaces battery changes

The solar cell charges from any light source and provides a 6-month power reserve when fully charged, removing the need for battery changes. The chronograph measures up to 60 minutes in 1/5-second increments with a split time function. This upgrade suits buyers who want a reliable tool watch without the maintenance of a quartz battery.

Check lug width and case dimensions before ordering

The case measures 41.4 mm in diameter, 13 mm thick, and 45.9 mm long with a 21 mm lug width. Verify that the lug width matches your preferred strap or bracelet options. Ensure the case thickness and length fit comfortably on your wrist and under shirt cuffs. The 100M water resistance rating supports swimming and snorkelling.

Highlights

  • Solar power eliminates battery changes with six-month reserve
  • Chronograph measures 60 minutes in 1/5-second increments with split function
  • 10 bar water resistance suits swimming and snorkelling to 100 metres
  • Curved sapphire crystal with anti-reflective coating protects the dial
  • LumiBrite hands and markers ensure legibility in darkness

Specifications

No published specifications for this item yet.

Questions about this item

What lug width does the 41.4 mm case need for a strap?

The case uses a 21 mm lug width, so any replacement strap or bracelet must match that width.

How do you start the solar movement after unboxing, and what step is often missed?

Expose the dial to bright light until the power reserve indicator shows full; the often-missed step is leaving it in strong light long enough for a complete charge.

What component will eventually need replacement despite the solar cell?

The rechargeable energy storage cell inside the solar movement will require replacement after many charge cycles.

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