CASIO A158WA-1D Watch

It's water resistant for everyday use — hand washing and rain — but not suitable for swimming or showering.

Similar design; the difference is the light — the A158 uses an LED, the A168 has an EL backlight that lights the whole dial.

Yes if you prefer a compact watch. The case is 33.2 mm wide, 8.2 mm thin and weighs 46 g, so it sits neatly on a smaller wrist.

Yes. CASIO presents it as a unisex design, with a compact case and adjustable bracelet that works for women and men.

No. The case and bezel are chrome-plated resin; the bracelet is stainless steel, as specified by CASIO.

Yes. Its stainless-steel bracelet has an adjustable clasp that can be repositioned to fit the wrist.

CASIO rates the CR2016 battery at about 7 years. Actual life depends on how often the light and alarm are used.

Yes. It has a green LED for reading the time in the dark; it is not the full-dial EL backlight used by the A168.

Yes. It has a daily alarm, hourly time signal and a 1/100-second stopwatch measuring up to 59 minutes 59.99 seconds.

It uses resin glass, which helps keep the watch light but can pick up scratches from hard or abrasive surfaces.

Yes. The suffix (F) is CASIO's market/packaging code — the watch itself is the same A158WA-1D.