The IWC Pilot's Watch Doppelchronograph ref. 3713 was produced from around 1996 to 2005. It was the second pilot's watch from IWC to have a split-second chronograph. You could get it in stainless steel, yellow gold, or platinum, with different dial options and day-discs in various languages. The steel version came with a strap or bracelet, while the platinum one had only five pieces made with a bracelet. After 2003, the 3713 was only available with Spitfire-style dials. The reference IW3713-18 has a Stainless Steel case and a Black dial.