S23607

Round the world flight 1929 - rare letter with great switzerland mixed postage with airmail issues and 5 Franken stamp!! sent from Zurich 13.VIII.29 to Friedrichshafen and carried by airship on it' s round the world Flight 1929 to Los Angeles (arrival postmark),very good quality, Sieger 30 Ab (Switzerland), Michel Zeppelin specialized catalogue 30 (Switzerland)