“Philatelisten congress 1929 Zurich”. Officially...

“Philatelisten congress 1929 Zurich”. Officially postal stationeries cover with 30 Rp. Tell, chargé from Lausanne in that Principality Liechtenstein to Vaduz, 22. 4. 1937, with additional franking K 28. for details and conditon see image

(via Philasearch.com - Switzerland Airmail Issues)

http://ift.tt/2qsJCKr