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 on the roundtrip from Zürich and back, franked for 1fr80rp, special flight cachet alongside in blue, as wel as an exhibition postmark, arrival c.d.s. dated 7.5 on the back, vf/f