The 20’000 FEET dive watch from CX Swiss Military Watch is currently the only mechanical timepiece able to plunge to more than a 6,000 meter ocean depth and survive. This feat has featured it in the Guinness Book of Records. The 20’000 FEET fears nothing: neither the pressures equivalent to 750 kg/cm2 exercised at the bottom of the ocean; nor a dynamite blast; nor even rifle bullets. You might fear its price tag though… Toughness like this doesn’t come cheap. You can have your own 20’000FEET watch for $4,413.52.