Darwin stated that the species with the best chance of survival were those most willing to change. In this respect, the new Aquatimer Chronograph’s chances of success are very promising. Because, compared with its predecessor, there are not only recognizable changes in appearance: the chronograph’s technical features also represent a massive leap forward in the evolution of the IWC Aquatimer. The newly developed external/internal rotating bezel with a SafeDive system designed to prevent inadvertent changes of the dive time boosts the practical use of the diver’s watch, as does the increase in water-resistance from 12 to 30 bar. The chronograph function handles single stop times and aggregate timing up to 12 hours.