Where possible, I try to buy clocks that automatically correct their time using the signal from the Atomic Clock in Boulder CO. The atomic clock loses 1 second every 300 million years... The magic of this always correct timepiece is the Cesium 133 core. It is the natural decaying of this isotope that allows the atomic clock to sat on track. 

Casio has a line of wristwatches called the Waveceptor series which can also automatically correct its time based on the Atomic clock signal. Now a Kickstarter project (link) wants to take things up a notch by giving you your very own (wristwatch) mini atomic clock. It's slightly less accurate than its older brother but losing 1 second every 1000 years isn't anything to be ashamed about. 

10 watches will be produced at a cost of $6,000 each. This is the ultimate timepiece for the watch freak in your life.