Tuesday, January 10, 2012
Swissair: Zürich-Genève-Libreville, May 1971
Three masks for three cities: the first flight for Swissair from Geneva to Libreville (with some sort of origin point at Zürich) on 13 May 1971. As with other first day covers from Swissair, the lower-right has a United Nations routing number, with the postage and cancellation stamp also of UN designation. There is no information on aircraft, or whether there were other stops between Geneva and M'Ba International.