Casio Edifice Solar Powered Chronograph EFS-S650D-2AEF

This is the watch

The Casio Edifice EFS-S650D-2AEF draws its visual direction from the brilliance and precision of exclusive sports cars. Dark blue and light blue form a cohesive front, where a discreet pattern print gives the dial more depth. Simple baton indices and three balanced sub-dials keep the chronograph layout clear. The result is a more compact Edifice with a technical character, but a more restrained appearance than the series' largest racing models.

Materials & Fit

This is the first Edifice model with a ceramic bezel. The polished ceramic is more scratch-resistant than stainless steel and retains its glossy surface well. The case and solid bracelet are made of stainless steel, with mirror-polished and finely brushed sections that highlight the flat construction. The sapphire crystal has an anti-reflective coating. Casio states a 39.5 mm case diameter, while the outer dimensions are 46.7 × 40.9 mm and the thickness is 11.7 mm. The watch weighs 140 grams, has a one-touch triple-fold clasp, and is specified for wrists measuring 150–205 mm.

Highlights

• The solar power system powers the watch with energy from light and provides approximately five months of operation from a full charge until the hands stop.
• The stopwatch measures full seconds for up to 29 minutes and 59 seconds.
• Measurement modes include elapsed time, split time, and first and second place times.
• The stated accuracy is ±20 seconds per month.
• Water resistance is 10 ATM, equivalent to 100 meters, and rated for swimming under normal conditions.

Good to know

• How is regular time displayed? Three central hands indicate hours, minutes, and seconds.
• What do the sub-dials show? They indicate 24-hour format and the stopwatch's minutes and seconds.
• Is there a date? Yes, the date is displayed in a separate window.
• How do you monitor the energy level? The watch has a battery level indicator and a low charge warning.