Casio Edifice EFS-S520 Series

Premium model from the Edifice line with sapphire crystal and carbon on the dial. A layer of carbon fiber [which is used in the tuning of racing cars] recalls the automotive focus of the brand, and sapphire crystal almost does not glare in the sun and does not scratch. Of the functions here, only the most necessary is a solar battery, which is charged from daylight, a stopwatch accurate to a split second and a date window. In this model, the Japanese introduced a new technology for recharging, reducing the area of ​​the photosensitive panel – now the watch needs even less light for stable charging. The cover with a screw lock not only protects the watch from moisture and small dust particles, but also simplifies access to the module.

Important Information

  • Year of first Release —  2017
  • Module Number — 5564
  • Battery Type — Solar (Edifice Batteries)

Edifice EFS-S520 Display Guide *for key functions only. For you to know how it works))

Crown Operations

Some water-resistant models (10BAR, 20BAR) have a screw-in crown. When you need to perform a crown operation, rotate it towards you to unscrew it. Then pull the crown out. Avoid applying undue force when pulling.


The stopwatch measures elapsed time in 1-second increments up to 29 minutes, 59 seconds.
– Do not operate the stopwatch with the crown pulled out.

EFS-S520 Model Range *may be updated

Official EFS-S520 Specs / Features *for base version EFS-S520CDB-1A

  • Case / bezel material: Stainless steel
  • One-touch 3-fold Clasp
  • Stainless Steel Band
  • Sapphire Glass with non-reflective coating
  • Screw Lock Back
  • 100-meter water resistance
  • Solar powered
  • 1-second stopwatch
    Measuring capacity: 29’59
    Measuring modes: Elapsed time, split time, 1st-2nd place times
  • Battery level indicator
  • Date display
  • Regular timekeeping
    Analog: 3 hands (hour, minute, second),
    3 dials (stopwatch minutes, stopwatch seconds, 24-hour)
  • Accuracy: ±20 seconds per month
  • Operating time from full charge until hands stop: Approx. 5 months
  • Size of case : 50×47.5×12.7mm
  • Total weight : 173g

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