The Spitfire Double Chronograph from IWC saw the addition of a fascinating function to this prestigious watch line: the chronograph split-seconds hand, also known by its French name, rattrapante. This feature can be used to time events or to measure intermediate times within a given minute with down-to-the-second precision. Apart from the additional hand, the feature that sets this watch apart is the third push-button located at the “10 o’clock” position on the case, which is mainly responsible for controlling intermediate times. At 17.1 millimetres, the 44-millimetre stainless-steel case housing the 79230-calibre chronograph movement is slightly slimmer than the Pilot’s Watch Double Chronograph Edition TOP GUN, its weighty counterpart made of black high-tech ceramic in the classical Pilot’s Watch family.