Extreme accuracy, water resistance and no batteries changes.
The photographs don't do the watch justice. The bezel is iridescent and blends well with the orange hands. If you are a sailor and utilize celestial navigation the needed accuracy is here. I set it to an atomic time signal and a month later I can see no difference in the position of the second hand. If you are a diver the level of water resistance is equal to a Rolex Submariner from the days when I began diving. The ECO drive system will keep the watch running for 6 months in the dark, no battery replacement necessary. I have an Omega dive quartz and the battery change and service cost $600.00. I own three Citizen watches; all three dive rated. One receives the atomic signal and provides dual times in cities around the globe. All three are amazingly accurate. I think its one of the best lines of watches on the market today.