This name does not only gather the word "water" and "time", two of the essential concepts in diving, but also conveys the best of the diving watches IWC has created. In this way the invaluable experiences of the IWC engineers converge in their manufacture. The famous internal ring is a common feature in the entire family of IWC Aquatimer replica. Also, several new developments have been integrated according to each model. For instance, the patented "memory" function of the minutes especially designed for diving or the new revolutionary self-winding system. IWC has paid special attention to functionality and clear vision under water. That is why the dial, the hands and the crowns are absolutely easy to consult, as all of them are covered with an orange, yellow or white luminescent substance. Certainly a watch ready for immersion.