The IWC Pilot's Watch Doppelchronograph IW3713 featuring a 42mm stainless steel case and an original black tritium dial is a highly collectible vintage transition watch prized for its iconic split-second complication.

• The Transition Factor: When IWC Schaffhausen upgraded from the preceding reference 3711 to the 3713 in 1996, they switched from a heavily domed crystal to a flat sapphire crystal. Early production runs of the 3713 initially retained the leftover tritium dials and hands before phasing them out completely for Luminova. 
• Aesthetic Patina: Unlike modern synthetic lumes, the radioactive tritium paint on these dials matures naturally into a highly sought-after beige, cream, or pumpkin patina over decades of exposure. 
• Mechanical Ingenuity: The third pusher located at the 10 o’clock position allows the wearer to stop one of the overlapping chronograph seconds hands to record split times while the primary timing sequence continues unimpeded.