Casio's new Edifice solar chronographs pack 1/20-second precision into a 38mm case for $200
Casio has put two new Edifice chronographs on sale in the US at $200 each, bringing sapphire crystal, solar charging, and 1/20-second timing precision to a price point that usually buys far less. Both models — the steel-bracelet EFSS660D-1A and the resin-strap EFSS660PB-1A — are available now at Casio.com. The case measures just 38.3mm wide, a deliberate step back from the oversized sport watch trend that has dominated shelves for the past decade.
The specs
The case dimensions are 45.3 × 38.3 × 11.6mm on both models. Casio fits a sapphire crystal with anti-reflective coating up top — a finishing detail more common at two or three times the price. Water resistance is rated to 100 metres. The steel model weighs 129g; the lighter resin version comes in at 71g. Both carry a date indicator and a tachymeter scale, which converts elapsed time into an average speed reading.
The chronograph measures down to 1/20 of a second and tracks intervals up to 59 minutes 59.95 seconds. It supports split time, total elapsed time, and first/second-place finishing times — making it genuinely usable for amateur motorsport or cycling, not just for wearing at the gym.
Solar life and accuracy
Power comes from Casio's Tough Solar system. A full charge runs the watch for roughly five months without any additional light exposure, per Casio. Accuracy is rated at ±20 seconds per month, which is standard for a quartz movement at this tier.
The two models differ mainly in aesthetics. The EFSS660D-1A pairs stainless steel with a blue central seconds hand. The EFSS660PB-1A gets a grey ion-plated case, a polymer strap, and a red seconds hand — a motorsport-inspired look that references Casio's longstanding racing-team partnerships.
Availability
The EFS-S660 debuted in Japan in early August 2026, rolled out to Europe shortly after, and is now officially on sale in the US. European store listings show €199 across German, Spanish, and Dutch markets, reports Notebookcheck, though no EU sale date has been confirmed yet. UK retail listings have not been announced. At $200, the EFS-S660 sits in a crowded tier alongside compact solar options from Seiko and Timex — but the sapphire crystal and sub-40mm case give Casio a clear differentiator for buyers who have grown tired of chunky dials.
