In 1998, IWC released the Pilot's Watch UTC 3251. It was a step up from the usual Mark XV pilot's watch, with a slightly bigger case and the addition of a rotating 24-hour disc for a second time zone. Initially, it ran on caliber 37526, but newer versions now use the 30710 movement. In 2005, the 'Spitfire' models were added, featuring more intricate dials. The reference IW3251-01 boasts a Stainless Steel case and a Black dial.