SWITZERLAND: 1924 Stationery card 10c bearing Romanshorn International air meeting day label in combination with air mail stamp, tied by "FLUGPOST * ROMANSHORN - ZURICH 9.VI.1924" violet cds. (Photo) (Image)

SWITZERLAND - 1924 Solothurn Air meeting flight day labe on cover from Zurich to Basel, 01.IX.24 cds. (Photo) (Image)

SWITZERLAND: 1925 Basel aerial view from 800m hight, bearing Basel flight air label in combination with air mail stamp, tied by rectagonal Basle-Zurich 10 May 1925 cachet. Zurich arrival. (Photo) (Image)

SWITZERLAND: 1926 Official iIllustrated postcard bearing International aviation exhibition label applied with air mail stamps on a card from Basel exhibition flight. All relevant cancellations applied. (Photo) (Image)