S19294

South America flight 1931 - letter of the second flight with 4 mark polarflight zeppelin stamp as single franking and transported with connecting flight from Berlin via Fraiedrichshafen with airship to Sankt Vicente (on the back arrival postmark), very good needs conservation and with certificate by Schlegel, BPP, Sieger 129 Eb, Michel Zeppelin-Spezial -Catalog 221 b