Wikipedia: "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 continued detention of prisoners by the analysts stationed at Guantanamo Bay. Briefing documents used to train staff in assessing the threat level of new detainees advise that possession of the F-91W suggests the wearer has been trained in bomb making by al-Qaeda in Afghanistan."United States Military intelligence officials have identified the F-91W as a watch that terrorists use when constructing time bombs.
On that basis having two working hands could indicate terrorist training as two would definitely be useful if making a bomb. Did "military intelligence" (an oxymoron) not consider that the wearer had one because it was reliable, cheap & available?