Suiza. Aéreo
Automatically generated translation
Yvert 12, 13(2). 1934. 1 f violet, 35 cts chestnut, two stamps and 30 cts blue. Graf Zeppelin from WINTERTHUR to PORTO ALEGRE (BRAZIL). Handwritten indication "Mit Zeppelin" and transit FRIEDRICHSHAFEN, on the front. MAGNIFICENT.