Casio F-91W
Casio F-91W-1 watch with a resin case and resin strap | |
| Manufacturer | Casio |
|---|---|
| Type | Quartz |
| Display | Digital |
| Introduced | June 1989 |
The Casio F-91W is a digital watch manufactured by Japanese electronics company Casio. Introduced in June 1989 as a successor of the F-87W, it is popular for its low price, long battery life and iconic design. As of 2011, annual production of the watch is 3 million units, which makes it the most sold watch in the world.