Casio Edifice Chronograph EFS-S650DC-1AEF

This is the watch

The all-black version of the EFS-S650 brings the series' sports car inspiration to a more concentrated expression. The dial's printed pattern, baton indices, and three sub-dials create the instrument-like structure that characterizes the chronograph. Dark gray level differences keep the details visible against the black background, while the warm accent color on one of the hands provides a contrast. The choice of colors gives the model family a distinctly subdued profile.

Materials & fit

The ceramic bezel is a novelty within Edifice and has higher scratch resistance than stainless steel. The case and solid bracelet are made of stainless steel, black ion-plated, and processed with mirror-polished and hairline brushed surfaces respectively. An anti-reflective sapphire crystal protects the front. The case diameter is 39.5 mm; the outer dimensions are 46.7 × 40.9 mm, and the profile measures 11.7 mm. The weight is 140 grams. The bracelet has a one-touch triple-fold clasp and a specified wrist range of 150–205 mm.

Highlights

• The solar power system converts light into energy and provides approximately five months of operation from a full charge until the hands stop.
• The stopwatch measures whole seconds with a capacity of 29 minutes and 59 seconds.
• Elapsed time, split time, and first and second place times are included as measurement modes.
• Casio specifies a precision of ±20 seconds per month.
• Water resistance of 10 ATM corresponds to 100 meters and allows swimming under normal conditions.

Good to know

• What information do the sub-dials show? They are used for 24-hour format and the stopwatch's minutes and seconds.
• How is the regular time read? Separate central hands indicate hours, minutes, and seconds.
• Does the model have a date display? Yes, the date is shown in its own window.
• Can the charging status be checked? Yes, both a battery level indicator and a low battery warning are available.