The Casio F-91W is a slim, lightweight digital watch with a resin case and strap, a basic LCD showing time, day and date, a daily alarm, an hourly time signal, a stopwatch and a backlight. It is water resistant rather than a dive watch, so it handles rain, handwashing and splashes but not swimming or showering. It suits anyone who wants a cheap, tough, no-fuss timekeeper, and it has become a cult classic for its plain look and long battery life. Rivals like the Casio W-86 and F-105W add slightly more water resistance or a longer backlight, but the F-91W stays the smallest and simplest of the family.
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Owners rate the F-91W very highly, calling it reliable, comfortable and almost indestructible for the money. Many describe wearing one for years with only a battery change. Complaints focus on the weak backlight, the basic resin strap and the limited water resistance.
