Casio's dangerous F-91W wristwatch

The BBC has a good article in the news magazine section about Casio's F-91W digital watch. Partly it's about quite how successful this humble, cheap watch has been, but it also touches on why it might be dangerous to be seen with one in certain places.

EDITED 27 APRIL: we originally mis-identified the source of this information as a US embassy leak, not a Guantanamo Bay leak. This has now been corrected.

Annoyingly, the piece is quite light on detail in this area, merely saying:

Now this unassuming, black, plastic, digital timepiece has found itself in the news for a different reason. Leaked US documents reportedly advised interrogators at Guantanamo Bay that possession of the F-91W could be a link to bombing by al-Qaeda.

Following the link to the Guardian article we see that ""possession of the F-91W - available online for as little as £4 - suggests the wearer has been trained in bomb making by al-Qaida in Afghanistan".

It's a revelation from one of the Wikileaks-leaked Guantanamo bay cables.