AIR MAIL and ZEPPELIN Switzerland

Quality: ✉

29.4.1939 SWISSAIR Europa Flight on the occasion of the Swiss National Exhibition of 1939 registered cover sent from Zürich to Cairo, Egypt and franked for 1fr80rp, stamps cancelled in Zürich, special flight cachet alongside in blue, returned to sender, various transit and arrival postmarks on both front and back, including the final Zürich return c.d.s. dated 10.7, uncommon, f