S23605

Round the world flight 1929 - rare letter with great switzerland mixed postage with 10 Franken stamp!! sent from Zurich 13.VIII.29 to Friedrichshafen and carried by by airship on it' s round the world Flight 1929 to Lakehurst (arrival postmark), perfect quality, Sieger 30 Ac (Switzerland), Michel Zeppelin specialized catalogue 31 (Switzerland)