EDIFICE timepiece that sparkles with Casio passion for new value and constant innovation.

The EFS-S640ZE embodies the spirit of craftsmanship inspired by the excitement of “making something from nothing” — the thrill of going from “0” to “1.” 

This solar powered EDIFICE chronograph features a black and gold color scheme that evokes the first flicker of light, that spark of innovative craftsmanship, where the creation of new value begins.

The gold-color band loop, laser engraved with “50th ANNIVERSARY,” flickers on the black band like a light that breaks the darkness and illuminates the path to value innovation.

As a special design touch, the inset dial at the 9 o’clock position is printed with 0’s and 1’s, capturing the Casio devotion to the art of making something from nothing. 

Based on the solar powered SOSPENSIOE EFS-S640, the watchcase in carbon fiber-reinforced resin features a unique design inspired by a formula car suspension with lugs configured in a four-arm arrangement. Together with the carbon fiber dial, this timepiece exudes a true motorsport feel. The band is made of Alcantara, a highly durable and breathable material used in the interior of sports cars. With its international certification for carbon neutrality, the fabric is also expected to help reduce environmental impact.

Case / bezel material: Carbon / Stainless steel / Aluminum
Alcantara material band
Sapphire crystal with anti-reflective coating
100-meter water resistance
Solar powered
1-second stopwatch
Measuring capacity: 29'59
Measuring modes: Elapsed time, split time, 1st-2nd place times
Hourly time signal
Battery level indicator
Low battery alert
Regular timekeeping:
Analog: 3 hands (hour, minute, second), 3 dials (24-hour, stopwatch minutes, stopwatch seconds)
Date display
Accuracy: ±20 seconds per month
Run time:
Operating time from full charge until hands stop: Approx. 5 months
Size of case : 50.1 × 44.5 × 13.8 mm
Total weight : 61 g