3rd Südamerikafahrt 1931, a round trip, certified letter cover as of Danzig 14.10. with colored mixed franking via F ' port 17.10., the return journey as of Recife 23.10. with among others 5,000, on reverse. Zeppelin, German and Brazilian flight cancel as well as advertising L6, takes advantage of you " the return journey ... " vs., arrival F ' port 10-28, as supply mail extremely rare variant in the literature and special catalogue to this day unknown