The Casio G-Shock is arguably the best watch to have in the event of a zombie apocalypse. Tough, durable, the very definition of rugged.
They have the best zombie-based commercial available, and it relies on you, using either your mouse on a computer, or your finger on the screen of a tablet, to determine whether an intrepid Brit and his girlfriend will survive, holed up in their post-apocalypse apartment.
You'll want to play again. First time, though, start out on "tourist" level.
Play it here. Will you survive Five Minutes?