À toi de jouer... Callaghan !!!
Alsa known as : À toi de jouer Callaghan
Tony Wright (Slim Callaghan)
Lysiane Rey (Dolorès)
Colette Ripert (Manon Gardel)
Paul Cambo (Nicky Storata)
Also from this series:
Airspeed AS.57 Ambassador 2 of BEA.
Given to be actually the fastest airliner by the trailer, but in 1955, the Vickers Viscount is already faster and in commercial use.
Probably of Alitalia-Linee Aeree Italiane.