Universal Time Coordinated (UTC) is an international time standard that is identical with Greenwich Mean Time (GMT). In an increasingly globalized world, it provides a time constant. It is immensely important to pilots and travellers who change continents and time zones in rapid succession, or for business people who communicate with associates all over the world. In the late 1990s, especially for them, IWC began making a reliable wristwatch with two time zones: the Pilots? Watch UTC with its 24-hour display. On the Spitfire UTC, local time is shown on the dial. This can be advanced or moved back in one-hour steps, even beyond the date. Home time (or UTC) is displayed in a 24-hour display window. In the new Spitfire UTC, the window, in the shape of section of a circle, has been moved from the top to the lower half of the dial and is mirrored horizontally, which improves the optical balance of the dial and makes the watch appear to almost smile. The UTC is now available only as part of the Spitfire collection.