Switzerland 1919 (26. 4. ), trial flight Dübendorf - Bern -...

Switzerland 1919 (26. 4. ), trial flight Dübendorf - Bern - Basle, postmark DÜBENDORF 26. IV. 19, verso A postmark Basle. . IV. 19. Attst Ruoss, LH 2500.-

(via Philasearch.com - Switzerland, Michel 19.1IIa)

http://ift.tt/1HSp5m6