The Caravelle, like the Concorde, was originally manufactured in Toulouse . It surely is in the top five of the most elegant airliners ever built, with the tear drop windows being its most distinguishing feature. The Caravelle was the worlds first twin engine short haul jet, entering service in 1960 beating the Americans by 4 years! It was a reasonable success with production spanning nearly 25 years up to the Caravelle III. United Airlines was a large operator in the U.S.