In the 1950’s Longines supplied watches to the Swiss national airline, Swissair. These timepieces, which had been developed specifically from the brand’s aviators’ watches, had a very distinctive 24-hour dial. This technical characteristic met the needs of navigators who, at the time, had to determine the position of the aircraft and set up a flight plan. Longines has now re-issued this watch for both historical and functional reasons, as well as for the aesthetic attraction it still holds. The new version has been given the name Longines Twenty-Four Hours.