Citizen

Citizen updates its 'Yacht' range with a dash of yellow. Its patented 'Eco-Drive' converts energy from any source into clean, time-telling output, so no trees need burn. Log on to the website for more horologic, utopian fun. The watch has a one-thousandth-of-a-second-accurate chronograph, and 22 timezone calendars, and is water resistant to 100M. The neat titanium bezel markings have a Klingon-esque feel, which may come in handy in, say, three centuries' time.