Breitling is a bran of Swiss watches from the Canton of Jura. The watchmaker offers Certified Chronometers designed primarily for aviation use, though most frequently worn as high-end luxury watches. Breitling's watches offer aviation functions, though their chronograph functions have become more of status symbols than practically applied tools. They typically have a large face (e.g. the Breitling for Bentley Motors edition has a 48 mm Case Diameter) for better visibility and to allow display of more information on the analog dials. Many other models feature an automatic winding mechanism that is purely mechanical (i.e. using no electronic components). A lot of Breitling watches are equipped with additional functions such as the flyback function, split-second, moon phase, date display and other complications.