Lot 11018 – 1930 (May 16) Graf Zeppelin South America flight,

1930 (May 16) Graf Zeppelin South America flight, envelope bearing fourteen 1923-30 1F airmail stamps (two on front, rest on reverse), tied by Romanshorn cds with return ds below, South America flight and Europe Pan-America Round Flight cachets, Friedrichshafen cds, very fine (Sieger 57, € 240, 398 carried), also 1930 (Sept. 14) Geneva-Zurich flight with 75c airmail (Sieger 87)