Description

1931 (Jul 9) Bi-lingual league of Nations printed envelope together with letter listing issues discussed & delgates names by airmail to Prague bearing 1924-33 Bi-plane 50c tied Geneva 10 /Societe des Nations (10 Jul) cds with Geneva /Aviation (10 Jul) + Basel Flugplatz/Luftpost (10 Jul) + Zurich Flugplatz/Luftpost (11 Jul) + Praha 1 (11 Jul) transit & Praha B2 Letiste (11 Jul) arrival cds …………………. Attractive item & very scarce with contents