IWC has a distinctive and storied history with the chronograph watch. The first IWC chronograph, the Porsche Design Chronograph 1 (Ref. 37000), was manufactured in 1980. It was the world’s first watch made of titanium, a highly innovative material, which was supposed to underline the timepiece’s sporty character. Designed by F.A. Porsche, this icon is easily recognizable thanks to a host of unique features, including its smoothly integrated pushers. Five years later, the Da Vinci became the first chronograph to feature a perpetual calendar, which just happened to be mechanically programmed for no less than 500 years. 2004 saw the introduction of the Aquatimer Split Minute Chronograph, with its second minute hand enabling the diver to time the duration of a decompression stop during a dive. And in 2007, IWC released its first in-house movement with a fully integrated chronograph – the Cal. 89000.