Casio F-91W

According to secret documents issued to interrogators at Guantanamo Bay, obtained and released by The Guardian, “the Casio F-91W digital watch was declared to be ‘the sign of al-Qaeda’ and a contributing factor to the continued detention of prisoners by the analysts stationed at Guantanamo Bay.

First introduced to the market in 1991, the F-91W is an absolute design classic. Created for extreme functionality, it has more or less everything you could ever want from a watch if you were to find yourself stranded in the wilderness with Bear Grylls (or, say, the mountains of Tora Bora with Ayman al-Zawahiri): it’s waterproof, precise (losing no more than 30 seconds in a given month), has a stopwatch, seconds timer, an alarm, an hourly beep, a backlight, it tells the date as well as the day of the week, and has an average battery life of seven years – which is probably more than triple the product lifecycle of most modern technologies