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1 retailer
Prospex Speedtimer Solar 1/100 second Ltd Ed Chronograph
The Seiko Prospex Speedtimer Solar 1/100 second Ltd Ed Chronograph is a 42 mm, 100 m water-resistant solar quartz watch with a sapphire crystal.
- Case
- 42 mm
- Water
- 100 m (328 ft)
- Movement
- Solar quartz
- Thickness
- 12.9 mm
Image not availableWhat the data says
- Lowest in-stock price is 22% below list price this week.
Computed from the specs below. How we write summaries.
Full specs
Last verified Oct 20, 2026
Seiko’s own site doesn’t allow automated reading, so specs, prices and photos come from Long Island Watch’s product page (longislandwatch.com), a retailer that sells it. Unless marked otherwise, every spec is quoted from that page.
| Case diameter | 42 mm |
|---|---|
| Thickness | 12.9 mm |
| Lug to lug | 48.3 mm |
| Lug width | 20 mm |
| Weight (manufacturer) | 0.34 lb (152 g) |
| Case | Stainless steel |
| Crystal | Sapphire |
| Strap | Stainless steel bracelet, deployant clasp |
| Water resistance | 100 m (328 ft) |
|---|
| Movement | Solar quartz |
|---|---|
| Caliber | Seiko Solar 8A50 |
| Battery / power reserve | 6-month power reserve when fully charged |
| Display | Analog |
| Luminous hands/markers | Yes |
| Stopwatch | Yes |
| Colorways | Brown Dial, White Dial |
|---|---|
| Warranty | 2 Years |
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